* sysdeps/unix/bsd/poll.c (__poll): Add code to extend sets if any
passed file descriptor exceeds the size determined by
getdtablesize.
* sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Update
from inline version in bits/socket.h.
* sysdeps/unix/sysv/linux/bits/socket.h: Define __cmsg_nxthdr as
inline function only is __USE_EXTERN_INLINES is defined.
* time/strftime.c (my_strftime): Make code a bit clearer.
Patch by Paul Eggert <eggert@twinsun.com>.
by removing SIG_IGN handler for SIGCHLD if necessary.
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