@section @code{sigprocmask}
@findex sigprocmask
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/sigprocmask.html}
+POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/sigprocmask.html}
Gnulib module: sigprocmask