Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Make wait6(2), waitid(3) and ppoll(2) cancellation points. The
waitid() function is required to be cancellable by the standard. The
wait6() and ppoll() follow the other syscalls in their groups.

Reviewed by: jhb, jilles (previous versions)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week

Formatting changes to the pthread_testcancel(3).

Use list for the cancellation points enumeration. Move notes about
functions into the list inline.

The discussion of the idiomatic use of cancellation facilities does
not belong to RETURN VALUES section, move it to NOTES.

Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks

Make kevent(2) a cancellation point.

Note that to cancel blocked kevent(2) call, changelist must be empty,
since we cannot cancel a call which already made changes to the
process state. And in reverse, call which only makes changes to the
kqueue state, without waiting for an event, is not cancellable. This
makes a natural usage model to migrate kqueue loop to support
cancellation, where existing single kevent(2) call must be split into
two: first uncancellable update of kqueue, then cancellable wait for
events.

Note that this is ABI-incompatible change, but it is believed that
there is no cancel-safe code that relies on kevent(2) not being a
cancellation point. Option to preserve the ABI would be to keep
kevent(2) as is, but add new call with flags to specify cancellation
behaviour, which only value seems to add complications.

Suggested and reviewed by: jilles
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks

use .Mt to mark up email addresses consistently (part6)

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

pthread_testcancel(3): Update list of cancellation points.

This should be a fairly complete list of cancellation points in libc, libthr
and librt, including standard as well as non-standard functions.

Hide the implementation details about multiple threading libraries
from the synopses of pthread*(3) manpages.

Reviewed by: deischen, davidxu

Remove mentions of libc_r.

Use 'manual page' instead of 'man page' for consistency.

Approved by: re (hrs)

Expand *n't contractions.

Document interfaces that are supported by libthr.

Have a single set of POSIX threads man pages. The LIBRARY section
of each manpage lists libraries that have corresponding interfaces
implemented.

Prodded by: threads
Reviewed by: deischen

The .Fn function. Use .Xr where appropriate.

Describe handling of NULLs passed to pthread_setcancelstate().

PR: docs/31745
Submitted by: Andrew <andrew@ugh.net.au>

mdoc(7) police: Use the new .In macro for #include statements.

mdoc(7) police: s/OpenBSD/.Ox/ where appropriate.

Use ``.St -p1003.1-96''.

mdoc(7) police: split punctuation characters + misc fixes.

Introduce .Lb macro to libc_r manpages.

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.

add pthread_cancel, obtained from OpenBSD.

eischen (Daniel Eischen) added wrappers to protect against cancled
threads orphaning internal resources.

the cancelability code is still a bit fuzzy but works for test
programs of my own, OpenBSD's and some examples from ORA's books.

add readdir_r to both libc and libc_r

add some 'const' attributes to function parameters

Reviewed by: eischen, jasone