Update doc for cygwin 1.7.

Update doc for cygwin 1.7.

* doc/posix-functions/faccessat.texi: Cygwin 1.7 added several new
functions.
* doc/posix-functions/fchmodat.texi: Likewise.
* doc/posix-functions/fchownat.texi: Likewise.
* doc/posix-functions/fdopendir.texi: Likewise.
* doc/posix-functions/fmemopen.texi: Likewise.
* doc/posix-functions/freeaddrinfo.texi: Likewise.
* doc/posix-functions/fstatat.texi: Likewise.
* doc/posix-functions/futimens.texi: Likewise.
* doc/posix-functions/gai_strerror.texi: Likewise.
* doc/posix-functions/getaddrinfo.texi: Likewise.
* doc/posix-functions/getnameinfo.texi: Likewise.
* doc/posix-functions/if_freenameindex.texi: Likewise.
* doc/posix-functions/if_indextoname.texi: Likewise.
* doc/posix-functions/if_nameindex.texi: Likewise.
* doc/posix-functions/if_nametoindex.texi: Likewise.
* doc/posix-functions/insque	.texi: Likewise.
* doc/posix-functions/linkat.texi: Likewise.
* doc/posix-functions/llrint.texi: Likewise.
* doc/posix-functions/llrintf.texi: Likewise.
* doc/posix-functions/llrintl.texi: Likewise.
* doc/posix-functions/lockf.texi: Likewise.
* doc/posix-functions/lrintl.texi: Likewise.
* doc/posix-functions/mkdirat.texi: Likewise.
* doc/posix-functions/mkfifoat.texi: Likewise.
* doc/posix-functions/mknodat.texi: Likewise.
* doc/posix-functions/mq_close.texi: Likewise.
* doc/posix-functions/mq_getattr.texi: Likewise.
* doc/posix-functions/mq_notify.texi: Likewise.
* doc/posix-functions/mq_open.texi: Likewise.
* doc/posix-functions/mq_receive.texi: Likewise.
* doc/posix-functions/mq_send.texi: Likewise.
* doc/posix-functions/mq_setattr.texi: Likewise.
* doc/posix-functions/mq_timedreceive.texi: Likewise.
* doc/posix-functions/mq_timedsend.texi: Likewise.
* doc/posix-functions/mq_unlink.texi: Likewise.
* doc/posix-functions/open_memstream.texi: Likewise.
* doc/posix-functions/openat.texi: Likewise.
* doc/posix-functions/posix_fadvise.texi: Likewise.
* doc/posix-functions/posix_fallocate.texi: Likewise.
* doc/posix-functions/posix_madvise.texi: Likewise.
* doc/posix-functions/posix_memalign.texi: Likewise.
* doc/posix-functions/posix_openpt.texi: Likewise.
* doc/posix-functions/readlinkat.texi: Likewise.
* doc/posix-functions/remque.texi: Likewise.
* doc/posix-functions/renameat.texi: Likewise.
* doc/posix-functions/rintl.texi: Likewise.
* doc/posix-functions/sem_unlink.texi: Likewise.
* doc/posix-functions/shm_open.texi: Likewise.
* doc/posix-functions/shm_unlink.texi: Likewise.
* doc/posix-functions/signgam.texi: Likewise.
* doc/posix-functions/sigset.texi: Likewise.
* doc/posix-functions/stpcpy.texi: Likewise.
* doc/posix-functions/stpncpy.texi: Likewise.
* doc/posix-functions/strerror.texi: Likewise.
* doc/posix-functions/strtod.texi: Likewise.
* doc/posix-functions/symlinkat.texi: Likewise.
* doc/posix-functions/unlinkat.texi: Likewise.
* doc/posix-functions/utimensat.texi: Likewise.
* doc/glibc-functions/bindresvport.texi: Likewise.
* doc/glibc-functions/dn_expand.texi: Likewise.
* doc/glibc-functions/exp10.texi: Likewise.
* doc/glibc-functions/exp10f.texi: Likewise.
* doc/glibc-functions/fgetxattr.texi: Likewise.
* doc/glibc-functions/flistxattr.texi: Likewise.
* doc/glibc-functions/fopencookie.texi: Likewise.
* doc/glibc-functions/freeifaddrs.texi: Likewise.
* doc/glibc-functions/fremovexattr.texi: Likewise.
* doc/glibc-functions/fsetxattr.texi: Likewise.
* doc/glibc-functions/getifaddrs.texi: Likewise.
* doc/glibc-functions/getxattr.texi: Likewise.
* doc/glibc-functions/lgetxattr.texi: Likewise.
* doc/glibc-functions/listxattr.texi: Likewise.
* doc/glibc-functions/llistxattr.texi: Likewise.
* doc/glibc-functions/lremovexattr.texi: Likewise.
* doc/glibc-functions/lsetxattr.texi: Likewise.
* doc/glibc-functions/pow10.texi: Likewise.
* doc/glibc-functions/pow10f.texi: Likewise.
* doc/glibc-functions/rcmd_af.texi: Likewise.
* doc/glibc-functions/removexattr.texi: Likewise.
* doc/glibc-functions/res_init.texi: Likewise.
* doc/glibc-functions/res_mkquery.texi: Likewise.
* doc/glibc-functions/res_query.texi: Likewise.
* doc/glibc-functions/res_querydomain.texi: Likewise.
* doc/glibc-functions/res_send.texi: Likewise.
* doc/glibc-functions/rresvport_af.texi: Likewise.
* doc/glibc-functions/setxattr.texi: Likewise.
* doc/glibc-functions/strcasestr.texi: Likewise.

Signed-off-by: Eric Blake <ebb9@byu.net>