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

I had some unrelated (wrong) changes to makewhatis. Undo them.

linprocfs: add support for /sys/kernel/random/uuid

PR: kern/186187
Submitted by: Fernando <fernando.apesteguia@gmail.com>
MFC After: 2 weeks

Currently the code uses gzFile * for a zlib file descriptor, which
is not correct. The code works by accident because gzFile is
currently defined as void *, and internally it would be casted from
or to its real type.

A newer version of zlib will instead define it as a pointer to a
specific type pointer (namely, struct gzFile_s *). This therefore
would cause stricter checks and compiler would catch this type
mismatch.

This change does not cause any changes to the resulting binary,
as validated with md5(1).

MFC after: 3 days

Modernize scandir(3) and alphasort(3) interfaces according to the IEEE
Std 1003.1-2008. Both Linux and Solaris conforms to the new definitions,
so we better follow too (older glibc used old BSDish alphasort prototype
and corresponding type of the comparision function for scandir). While
there, change the definitions of the functions to ANSI C and fix several
style issues nearby.

Remove requirement for "sys/types.h" include for functions from manpage.

POSIX also requires that alphasort(3) sorts as if strcoll(3) was used,
but leave the strcmp(3) call in the function for now.

Adapt in-tree callers of scandir(3) to new declaration. The fact that
select_sections() from catman(1) could modify supplied struct dirent is
a bug.

PR: standards/142255
MFC after: 2 weeks

%.s expects an int as the length specifier, so cast properly.

Teach makewhatis.c to treat .SS with the same severity as .SH.

At least one port (net-mgmt/net-snmp) creates man-pages which are
in the format:

.SH NAME
The Net-SNMP agent \- The snmp agent responds to SNMP queries from management stations.

.PP
.SS "Modules"

At this moment, makewhatis determines the end of the .SH NAME section
as where it finds .SH again, but there is none here, is it "terminated"
by the .SS.

PR: bin/116706
Submitted by: edwin@
Approved by: re (Ken Smith), grog (mentor)
MFC after: 1 week

Prepare for MACHINE and hw.machine switching to "pc98" on FreeBSD/pc98.

Reviewed by: nyan

ANSIify function definitions.
Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.

Reviewed by: md5

Remove a debug output statement.

- Fix the code in sbuf_need() to double the allocation size until
the new content size fits into the sbuf, instead of assuming
that allocating twice the old size is enough.
- Use memmove(3) rather than strcpy(3) to copy overlapping
strings.

PR: bin/39930

Use size_t or ino_t instead of int, and remove a few warnings.
The makewhatis utility is now ok with WARNS=3.

Reviewed by: bde

Unroff all forms of \f and \*, and the simplest form of \s.

Submitted by: fenner, ru
Reviewed by: ru, fenner

More whitespace fixes.

Fixed spacing.

Look into machine specific subdirs.

Add C rewrites of catman and makewhatis. These aren't quite as
the submitter supplied them, as I did some WARNS=n fixups (mostly
const-ification).

Submitted by: John Rochester <john@jrochester.org>