Remove needless includes of netinet6/ip6_var.h header in userland.

OK millert@

MAXCOMLEN is no longer needed in these programs, so remove the annotation
from sys/param.h include lines, or remove the include lines entirely if
it this was the least requirement.
ok millert

annotate what symbols are used from sys/param.h lines, or delete them
if not required. when deleting, add sys/signal.h or other lines which
were not being pulled in

I am retiring my old email address; replace it with my OpenBSD one.

Fix "_nfiles" reference for crash dump.
Diff from fukaumi at soum.co.jp

ok mpi

Stop assuming <sys/file.h> will pull in fcntl.h when _KERNEL is defined.

ok millert@ sthen@

p_comm is the process's command and isn't per thread, so move it from
struct proc to struct process.

ok deraadt@ kettenis@

Split PID from TID, giving processes a PID unrelated to the TID of their
initial thread

ok jsing@ kettenis@

Add va_nlink information to struct kinfo_file (so bump the shlib minor)

from Sebastien Marie

Make KERN_FILE_BYPID return ESRCH when PID not found, both in sysctl and
offline paths. More polishing to come.

Input and okay bluhm@ & kettenis@.

no more systrace

fix a race when fetching files from the kernel. the number of files
might have increased between when we got the number of files and
when we requested that number of files.

now we allocate another 1

fix a race when fetching files from the kernel. the number of files
might have increased between when we got the number of files and
when we requested that number of files.

now we allocate another 10ish percent on top of what the kernel
says we need, and retry if that still isnt enough.

while here use realloc instead of constantly going through free/malloc
sequences.

with input from claudio@ deraadt@
ok millert@ guenther@

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Rework the UNIX domain socket garbage collector, including ideas from
{Free,Net}BSD
- when a socket is closed with fds in its input, defer closing them to
a task to avoid recursing. This elimina

Rework the UNIX domain socket garbage collector, including ideas from
{Free,Net}BSD
- when a socket is closed with fds in its input, defer closing them to
a task to avoid recursing. This eliminates the complicated extra
reference taking which had a 37 line(!) comment explanation
- move flags, counts, and links only needed for this from struct file to
struct unpcb
- document the flow of the mark/sweep collector

much help from claudio@ who made me explain the GC to him until we trusted it
ok claudio@ mpi@ deraadt@

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Replace the hand-crafted list of datagram unix domain sockets with
a SLIST.
OK mpi@ benno@

Extend struct kinfo_file a bit for netstat (sync with the kernel).
Bump minor number because of this.
OK guenther@

Prefer arg != 0 over arg for non-boolean. nitted kettenis@

sysctl({CTL_KERN, KERN_FILE, KERN_FILE_BYFILE}) previously required
the extra argument to be zero; instead, make it filter on the file
type (DTYPE_*) when non-zero to make claudio's netstat work easi

sysctl({CTL_KERN, KERN_FILE, KERN_FILE_BYFILE}) previously required
the extra argument to be zero; instead, make it filter on the file
type (DTYPE_*) when non-zero to make claudio's netstat work easier.

ok claudio@

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Move to the <limits.h> universe.
review by millert, binary checking process with doug, concept with guenther

Nuke yet more obvious #include duplications.

ok deraadt@

Put the socket splicing fields into a seperate struct sosplice that
gets only allocated when needed. This way struct socket shrinks
from 472 to 392 bytes on amd64. When splicing gets active, anothe

Put the socket splicing fields into a seperate struct sosplice that
gets only allocated when needed. This way struct socket shrinks
from 472 to 392 bytes on amd64. When splicing gets active, another
88 bytes are allocated for struct sosplice.
OK dlg@

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Remove unnecessary netinet/in_systm.h include.

ok millert@

Apply reallocarray() idiom.
ok guenther

Track whether a process is a zombie or not yet fully built via flags
PS_{ZOMBIE,EMBRYO} on the process instead of peeking into the process's
thread data. This eliminates the need for the thread-leve

Track whether a process is a zombie or not yet fully built via flags
PS_{ZOMBIE,EMBRYO} on the process instead of peeking into the process's
thread data. This eliminates the need for the thread-level SDEAD state.

Change kvm_getprocs() (both the sysctl() and kvm backends) to report the
"most active" scheduler state for the process's threads.

tweaks kettenis@
feedback and ok matthew@

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Eliminates struct pcred by moving the real and saved ugids into
struct ucred; struct process then directly links to the ucred

Based on a discussion at c2k10 or so before noting that FreeBSD and
NetB

Eliminates struct pcred by moving the real and saved ugids into
struct ucred; struct process then directly links to the ucred

Based on a discussion at c2k10 or so before noting that FreeBSD and
NetBSD did this too.

ok matthew@

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More crash dump parsing fixes: correct paddr in process info and pids
in file info. Drop some unnecessary casts and unused variables too.

ok millert@