- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

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

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

Change the behaviour of `-v' so that, e.g., stepping a month back
on March 31 won't take you to March 2 or 3 (now the result will
be the last day of February.)

In general, now stepping by months from the last days of the current
month A will take you to the very last day of the target month B if
B is shorter than A.

The previous version would just step to March 31 and rely on mktime(3)
to correct the date. Despite its simplicity, such way was counter-intuitive
to users and caused pain to shell script writers.

Noticed by: Igor Timkin <ivt at gamma dot ru>
Approved by: brian
MFC after: 2 weeks

Consistently use __FBSDID

Fix warnings inspired by lint, a commercial lint and WARNS=4.

Exit if malloc() returns NULL

Submitted by: Chris Faulhaber <jedgar@fxp.org>

Propogate the ``call mktime'' flag from adjwday() down to adjday().

Submitted by: Christian Weisgerber <naddy@mips.inka.de>

Null commit [correction for the previous version]
Units of *hours* or less honour DST

Change -v so that variences in units of days or less are sensitive to
DST. Explain in more detail what date -v does when mixed with DST.

Previous code suggested broken by: wollman

Always give mktime a timeval with tm_isdst set to -1, otherwise
things get a bit out-of-phase when we step backwards 1 hour from
between 0:00 and 1:00 on the first of the month following the
transition into Summer time. This is probably actually a bug
in mktime().

PR: 10963

If mktime() fails and 68 < year < 138, assume that the reason is
because of Summer time and adjust up or down according to our
adjusting context by one hour. This assumes that all DSTs are
multiples of 1 hour.

PR: 6223, 17750

Re-add "May" to the list of dates supported.

Approved by: jkh

$Id$ -> $FreeBSD$

First set of fixes to keep egcs happy. These include {} around single
statement if blocks[*] when the else could be ambiguous, not defaulting
to int type and removal of some unused variables.

[*] This is explicitly allowed by style(9) when the single statement
spans more than one line.

Reviewed by: obrien, chuckr

Support seconds with -v.
PR: 6308
Submitted by: Max Euston <meuston@jmrodgers.com>

Correct use of .Nm and other cosmetics. Add rcsid. Remove unused #inc.

Add (BSD) copyright headers.

Change [-DMHW [+|-]val] to [-v [+|-]val[ymwdHM]]
Support Hours & Minutes
Add -Wall to Makefile

Add [-DWMY] flags for date adjustment.
Discussed with: freebsd-hackers