Make sunrpc code usable again

Make sunrpc code usable again

This in effect reverts the obsoletion of the sunrpc code.

2012-05-09  Andreas Schwab  <schwab@linux-m68k.org>
	    Andreas Jaeger  <aj@suse.de>

	* configure.in (obsolete-rpc): Add new option --enable-obsolete-rpc.
        * config.h.in (LINK_OBSOLETE_RPC): Add.
        * config.make.in (link-obsolete-rpc): Add.
        * include/libc-symbols.h (libc_hidden_nolink_sunrpc): Rename from
        libc_hidden_nolink and define based on LINK_OBSOLETE_RPC.
        * sunrpc/Makefile (headers)[link-obsolete-rpc]: Add rpc headers.
        (shared-only-routines): Do not use with link-obsolete-rpc.
        * nis/Makefile (headers)[link-obsolete-rpc]: Add rpc headers.
	* sunrpc/auth_des.c: Use libc_hidden_nolink_sunrpc.
	* sunrpc/auth_none.c: Likewise.
	* sunrpc/auth_unix.c: Likewise.
	* sunrpc/authdes_prot.c: Likewise.
	* sunrpc/authuxprot.c: Likewise.
	* sunrpc/clnt_gen.c: Likewise.
	* sunrpc/clnt_perr.c: Likewise.
	* sunrpc/clnt_raw.c: Likewise.
	* sunrpc/clnt_simp.c: Likewise.
	* sunrpc/clnt_tcp.c: Likewise.
	* sunrpc/clnt_udp.c: Likewise.
	* sunrpc/clnt_unix.c: Likewise.
	* sunrpc/des_crypt.c: Likewise.
	* sunrpc/des_soft.c: Likewise.
	* sunrpc/get_myaddr.c: Likewise.
	* sunrpc/key_call.c: Likewise.
	* sunrpc/key_prot.c: Likewise.
	* sunrpc/netname.c: Likewise.
	* sunrpc/pm_getmaps.c: Likewise.
	* sunrpc/pm_getport.c: Likewise.
	* sunrpc/pmap_clnt.c: Likewise.
	* sunrpc/pmap_prot.c: Likewise.
	* sunrpc/pmap_prot2.c: Likewise.
	* sunrpc/pmap_rmt.c: Likewise.
	* sunrpc/publickey.c: Likewise.
	* sunrpc/rpc_cmsg.c: Likewise.
	* sunrpc/rpc_common.c: Likewise.
	* sunrpc/rpc_dtable.c: Likewise.
	* sunrpc/rpc_prot.c: Likewise.
	* sunrpc/rpc_thread.c: Likewise.
	* sunrpc/rtime.c: Likewise.
	* sunrpc/svc.c: Likewise.
	* sunrpc/svc_auth.c: Likewise.
	* sunrpc/svc_raw.c: Likewise.
	* sunrpc/svc_run.c: Likewise.
	* sunrpc/svc_tcp.c: Likewise.
	* sunrpc/svc_udp.c: Likewise.
	* sunrpc/svc_unix.c: Likewise.
	* sunrpc/svcauth_des.c: Likewise.
	* sunrpc/xcrypt.c: Likewise.
	* sunrpc/xdr.c: Likewise.
	* sunrpc/xdr_array.c: Likewise.
	* sunrpc/xdr_float.c: Likewise.
	* sunrpc/xdr_intXX_t.c: Likewise.
	* sunrpc/xdr_mem.c: Likewise.
	* sunrpc/xdr_rec.c: Likewise.
	* sunrpc/xdr_ref.c: Likewise.
	* sunrpc/xdr_sizeof.c: Likewise.
	* sunrpc/xdr_stdio.c: Likewise.