Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC: r267131, r267132, r267133, r268493, r268671

Use NULL instead of 0 (Patch by Sascha Wildner <saw at online.de> for Dragonfly)
Remove unnecessary semicolons (Patch by Sascha Wildner <saw at online.de> for Dragonfly)
Add support for arbitrary http requests [1]
Support EAGAIN in fetch_writev

Submitted by: Alex Hornung <alex at alexhornung.com> [1]
Reviewed by: des

MFH (r260904): fix format string
MFH (r261230, r261263): fix buffering issues
MFH (r261284): bump copyright

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Implement certificate verification, and many other SSL-related
imrovements; complete details in the PR.

PR: kern/175514
Submitted by: Michael Gmelin <freebsd@grem.de>
MFC after: 1 week

Merge OpenSSL 1.0.1c.

Approved by: benl (maintainer)

Fix two issues related to the use of SIGINFO in fetch(1) to display
progress information. The first is that fetch_read() (used in the HTTP
code but not the FTP code) can enter an infinite loop if it has previously
been interrupted by a signal. The second is that when it is interrupted,
fetch_read() will discard any data it may have read up to that point.
Luckily, both bugs are extremely timing-sensitive and therefore difficult
to trigger.

PR: bin/153240
Submitted by: Mark <markjdb@gmail.com>
MFC after: 3 weeks

latin1 -> utf8

Update copyright dates and strip my middle name.

Add support for the NO_PROXY / no_proxy environment variable as used by
lynx, curl etc. Note that this patch differs significantly from that
in the PR, as the submitter refined it after submitting the PR.

PR: 110388
Submitted by: Alexander Pohoyda <alexander.pohoyda@gmx.net>
MFC after: 3 weeks

Clean up namespace violations.

MFC after: 1 week

Update copyright years.

Add and document support for a FETCH_BIND_ADDRESS environment variable
specifying a local address to bind sockets to. Caveat: lightly tested.

PR: bin/37572

Experimental support for .netrc.

Introduce _fetch_writev(), which is the conn_t version of writev(2). In
the SSL case, it is no different from the old _fetch_write(), but in the
non-SSL case it uses writev(2) to send the entire vector as a single
packet (provided it can fit in one packet). Implement _fetch_write()
and _fetch_putln() in terms of _fetch_writev().

This should improve performance in the non-SSL case (by reducing protocol
overhead) and solve the problem where too-smart-for-their-own-good
firewalls reject FTP packets that do not end in CRLF.

PR: bin/44123
Submitted by: fenner

Add a reference count to struct fetchconn so we don't prematurely close and
free a cached FTP connection.

Make SSL support conditional on NOCRYPT.

Add SSL support + slight cleanup.

Submitted by: Henry Whincup <henry@techiebod.com> (in principle)

Wrap everything in struct connection, and enforce timeouts everywhere
(except for DNS operations). Always use funopen() for HTTP, to support
both timeouts and SSL.

First step towards SSL support: wrap connections in a 'struct connection'
which contains the socket descriptor, the input buffer and (yet unused)
SSL state variables. This has the neat side effect of greatly improving
reentrance (though we're not *quite* there yet) and opening the door to
HTTP connection caching.

This commit is inspired by email conversations with and patches from
Henry Whincup <henry@techiebod.com> last fall.

Reindent, and add parentheses to return statements. Some functions in
ftp.c and http.c now have exceedingly long lines due to deep nesting;
this will be corrected by reorganizing the code in a later revision.

Introduce a fetchDebug global. Change the DEBUG macro so it only runs the
debugging code if fetchDebug is set.

PR: bin/32615
MFC after: 1 week

Add prototype for _ftp_request().

Tons of type, style and warning fixes that have been rotting in my tree for
ages - some of which wouldn't be necessary if gcc wasn't broken or TPTB were
willing to do something (-fno-builtin) about it.

Apply 'const' liberally.

Fix some other minor glitches.

Use the documented (and historical) defaults. Centralize the decision logic
in order to avoid this bug in the future.

Submitted by: se

Add CHECK_FLAGS, a macro for (safely) checking if a particular flag is set.

ftp.c needs _http_request()

Centralize the default port finding code.
Work around YA Apache bug: don't send port in Host: header if it's the
default port.

Add _fetch_putln()

Dump com_err, it's a stinking crock of shit.

IPv6 support.

More old uncommitted patches: implement timeouts at the protocol level.
Currently only supported for ftp connections.

$Id$ -> $FreeBSD$

Implement and document file list retrieval.

Don't specify a language to compile_et.
Rename fetchConnect to _fetch_connect since it's internal.

Add verbose flag, and support functions.
Brucify the Makefile.
Differentiate atime and mtime in fetch*Stat().
Fix a few pointer bugs.
Tweak some error messages.
Don't #include sys/param.h and stdio.h in fetch.h.
Document that sys/param.h and stdio.h must be #included before fetch.h.

Second of a series of cleanups to libfetch.

This commit introduces the following features:

a) the fetchStat*() functions, which return meta-information for a
document, such as size, modification time, etc.

b) the use of the com_err(3) facilities to report errors.

It also fixes a bunch of style bugs and a few logic bugs and somewhat
improves the man page.

Changed files, in alphabetical order:

Makefile:
Don't generate macros in {ftp,http}err.c.

Generate category fields for the error message lists.

Compile the error table.

Install fetch_err.h along with fetch.h.

common.c:
Remove the _netdb_errstring() macro, and add FETCH_ERR_NETDB to the
error code in the _netdb_seterr() macro.

Add categories to the _netdb_errlist table.

Report errors through the Common Error library.

common.h:
Add the DEBUG macros.

Add prototype for fetchConnect().

Remove the prototype for _fetch_errstring(), which is local to common.c

Add a categroy field to struct fetcherr, and define constants for
error categories.

Define macros for _{url,netdb,ftp,http}_seterr().

errors.et: (new file)
List error categories.

fetch.3:
Document the fetchStat*() functions.

Move the "unimplemented functionality" comments from NOTES to BUGS.

Document that applications which use libfetch must also use
libcom_err, and list existing error codes.

Undocument fetchLastErr{Code,String}.

Remove the (empty) DIAGNOSTICS section.

Mention Eugene Skepner in the AUTHORS section.

fetch.c:
Move the DEBUG macros to common.c

Add fetchStat() and fetchStatURL().

Generate error messages for URL parser errors, and fix a minor bug
in the parser.

Use 'struct url' instead of 'url_t'.

Remove fetchLastErr{Code,String}.

fetch.h:
Use 'struct url' instead of 'url_t', and remove the typedef.

Define struct url_stat (used by fetchStat()).

Add prototypes for fetchStat*().

Remove the declarations for fetchLastErr{Code,String}.

Include fetch_err.h.

fetch_err.et: (new file)
Error table for libfetch.

file.c:
Add fetchStatFile().

Use 'struct url' instead of 'url_t'.

ftp.c:
Add fetchStatFTP().

Use 'struct url' instead of 'url_t'.

Don't use fetchLastErrCode.

ftp.errors:
Add categories to all error messages.

http.c:
Add fetchStatHTTP().

Use 'struct url' instead of 'url_t'.

Don't use fetchLastErr{Code,Text}.

http.errors:
Add categories to all error messages.

Prompted by: jkh and Eugene Skepner
Numerous sugestions from: Garett Wollman and Eugene Skepner

First of a series of cleanups to libfetch. Changed files, in
alphabetical order:

Makefile:
Add common.c to SRCS.

Make debugging easier by making 'CFLAGS += -DNDEBUG' conditional on DEBUG

Don't declare struct {ftp,http}err in {ftp,http}err.c; use struct fetcherr
instead.

README:
Remove the todo list, which is out of date anyway.

common.c: (new file)
Gather utility functions in this file.

Merge the error reporting functions intp _fetch_errstring(),
_fetch_seterr() and _fetch_syserr().

Set fetchLastErrCode and fetchLastErrText appropriately when fetchConnect
fails.

common.h: (new file)
Gather internal prototypes and structures in this files.

fetch.3:
Undocument fetchFreeURL().

Document a few more known bugs.

Document fetchLastErrCode and fetchLastErrText.

fetch.c:
Add descriptive comments to all functions that lacked them.

Move fetchConnect() to common.c.

Obviate the need for fetchFreeURL(), and remove it.

fetch.h:
Modify struct url_t so the document part is at the end.

ftp.c:
Remove code that is duplicated elsewhere.

http.c:
Remove code that is duplicated elsewhere.

Prompted by: jkh