sigsetmask() and sigblock() are no longer used by any setjmp implementation
so the internal hidden names are unused; switch to PROTO_DEPRECATED()
and drop the DEF_WEAK()s

Merge the sigaction() and sigprocmask() overloads/wrappers from libpthread
into libc, and move pthread_sigmask() as well (just a trivial wrapper).
This provides consistent handling of SIGTHR between

Merge the sigaction() and sigprocmask() overloads/wrappers from libpthread
into libc, and move pthread_sigmask() as well (just a trivial wrapper).
This provides consistent handling of SIGTHR between single- and multi-threaded
programs and is a step in the merge of all the libpthread overloads, providing
some ASM and Makefile bits that the other wrappers will need.

ok deraadt@ millert@

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Do provide hidden _libc_* aliases for sig{block,setmask} and use them in
the ASM *setjmp implementations.
Skip the PLT when calling them on amd64 (other archs to do this after testing)

ok miod@

Move to the <limits.h> universe.
review by millert, binary checking process with doug, concept with guenther

zap remaining rcsid.

Kill old files that are no longer compiled.

okay theo

ansification; checked by pval

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

initial import of NetBSD tree