MFC r267667:
use .Mt to mark up email addresses consistently (part1)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

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

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

Revert r253748,253749

This WIP should not have been committed yet.

Pointyhat to: avg

remove needless inclusion of machine/cpu.h in userland

MFC after: 21 days

Rework all non-contributed files that use `struct timezone'.

This structure is not part of POSIX. According to POSIX, gettimeofday()
has the following prototype:

int gettimeofday(struct timeval *restrict tp, void *restrict tzp);

Also, POSIX states that gettimeofday() shall return 0 (as long as tzp is
not used). Remove dead error handling code. Also use NULL for a
nul-pointer instead of integer 0.

While there, change all pieces of code that only use tv_sec to use
time(3), as this provides less overhead.

Fix a variety of grammar and style nits

PR: docs/165841
Submitted by: Robert Simmons <rsimmons0@gmail.com>
Approved by: brd
MFC after: 1 week

Raise WARNS for various tools where possible.

Submitted by: Marius Nünnerich <marius@nuenneri.ch>

Switch the default WARNS level for sbin/ to 6.

Submitted by: Ulrich Spörlein

If not compiled for debugging, redirect standard input/output/error
to /dev/null before becoming a daemon.

Correct various mistakes in the last commit.

Use sysctlbyname

Expand *n't contractions.

Sort sections.

Invoke tzset(3) within the main loop to catch changes to /etc/localtime
when running as a daemon in the hope that it will fix situations
where the CMOS clock was apparently set using the stale TZ offset.

Use __FBSDID() to quiet GCC 3.3 warnings.

s/filesystem/file system/g as discussed on -developers

The .Nm utility

more file system > filesystem

o Use real prototypes
o Remove __P.
o main(int, char *[])

Default to WARNS=2.
Binary builds that cannot handle this must explicitly set WARNS=0.

Reviewed by: mike

Fix a prototype and set WARNS=2.

Submitted by: Mike Barcroft <mike@q9media.com>

mdoc(7) police: removed HISTORY info from the .Os call.

- VFS_SET(msdos) -> VFS_SET(msdosfs)
- msdos.ko -> msdosfs.ko
- mount_msdos(8) -> mount_msdosfs(8)
- "msdos" -> "msdosfs" compatibility glue in mount(8)

- Backout botched attempt to introduce MANSECT feature.
- MAN[1-9] -> MAN.

Set the default manual section for sbin/ to 8.

Eliminate mdocNG warnings caused by misplaced or extraneous macro calls.

Prepare for mdoc(7)NG.

mdoc(7) police: use the new features of the Nm macro.

Use Fx macro wherever possible.

Remove single-space hard sentence breaks. These degrade the quality
of the typeset output, tend to make diffs harder to read and provide
bad examples for new-comers to mdoc.

$Id$ -> $FreeBSD$

Correct use of .Nm. Add missing .El. Add rcsid. Remove unused #include.

Implement Helbig idea of offset calculation reducing mktime() calls
Immediately exit if /etc/wall_cmos_clock not present

Add workaround suggestion for 'nonexistent time' diagnostic

.Sh AUTHOR -> .Sh AUTHORS. Use .An/.Aq.

Minimize clock drift between getting and setting time
Submitted by: bde

Add Id, add usage function.

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Sort cross references.

English corrections from jdp.
Add main purpose description (MSDOS timestamps)

Correct some man page cross references and file location references.

More info and more corrections

Describe new adjkerntz variant + various changes from jdp

Detect if /etc/wall_cmos_clock gone while adjkerntz paused.

Dynamically sense /etc/wall_cmos_clock presence/absense

Fix error with multiply 'adjkerntz -a' copies running.
Manage adjkerntz kernel variable even for UTC clocks.
Code cleanup.

Remove trailing whitespace.

Use more AI to predict initial/final isdst,
latest isdst preffered.

Use timelocal() instead of mktime() hack

Fix resetting adjkerntz to 0 (pointed by Bruce),
forget to initialize mib variable.

Optimize setting of DISRTCSET

Clean internal logic, helps for some unusual cases

Fix spelling/grammar errors

-i case goes to background pause and acts like -a case on receiving
SIGTERM. This helps to keep CMOS clock updated before reboot.
Idea from J.Wunsch.

Restore back -i, -a

Restore back -i, -a

Remove options, run adjkerntz as daemon now

Now:
adjkerntz -i writes kernel clock only, don't touch RTC clock
adjkerntz -a writes RTC clock only, don't touch kernel clock

Modify adjkerntz to not write RTC clock per initial call,
suggested by Bruce

Correction for new sysctl interface

rewritted to use sysctl, no more /var/run/.adjkerntz now

Cosmetique patch from bde

Fix sign of offset diff.
Use Bruce initial/final hour scheme to avoid critical hours.

This commit was generated by cvs2svn to compensate for changes in r867,
which included commits to RCS files with non-trunk default branches.