reboot.2: tfix (double word) and minor format issue

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
pthread_setname_np.3: wfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
arp.7: wfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
getcpu.2, getunwind.2, kcmp.2, mmap.2, perf_event_open.2, perfmonctl.2, quotactl.2, restart_syscall.2, btree.3, dbopen.3, hash.3, recno.3, sched_getcpu.3, elf.5, bootparam.7, hier.7, netdevice.7, rtnetlink.7: wfix: "xxxx specific" ==> "xxxx-specific"
netdevice.7, packet.7, udp.7: grfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
accept.2, clock_getres.2, mkdir.2, request_key.2, wait.2, printf.3, bootparam.7: grfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
syscall.2, syscalls.2, ftw.3, getauxval.3, mcheck.3, puts.3, scanf.3, strftime.3, libc.7: tstamp

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Changes: Ready for 3.56

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Changes: tfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Expanded tabs
Removed trailing white space at end of lines
Ready for 3.56
Start of man-pages-3.57: renaming .Announce and .lsm files
Start of man-pages-3.57: updating .Announce and .lsm files
Start of man-pages-3.57: updating Changes and Changes.old
gets.3: tfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Changes.old: tfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
stpncpy.3: wfix

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
tcgetpgrp.3: ATTRIBUTES: Note functions that are thread-safe

The functions tcgetpgrp() and tcsetpgrp() are thread safe.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
tcgetsid.3: ATTRIBUTES: Note function that is thread-safe

The function tcgetsid() is thread safe.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>