fanotify_mark.2: tfix: xrefs

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
mount.2: tfix: page xref

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
open_by_handle_at.2: tfix: page xref

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
capget.2, ptrace.2, vhangup.2, wait.2, ttyslot.3, console.4, proc.5, utmp.5, boot.7: tfix: page xrefs for init
signal.7: pthread_mutex_lock() and pthread_cond_wait() are restartable

pthread_mutex_lock(, pthread_cond_wait(), and related APIs are
automatically restarted if interrupted by a signal handler.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
socket.7: srcfix: Add FIXME

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
truncate.2: wfix

Reported-by: Jonny Grant <jg@jguk.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
abs.3: wfix

Reported-by: Jonny Grant <jg@jguk.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>