Updated to 5.84

Upstream changes:
5.84  Sat Mar  9 17:36:08 MST 2013
	- untweaked Makefile.PL to remove dependencies of SHA.c
		-- dependencies were breaking builds on VMS
		-- retaining dependencies provides too little benefit
			for cost of portable workaround

5.83  Mon Mar  4 08:12:00 MST 2013
	- removed code for standalone C operation (no longer used)
		-- eliminates need for external symbols
		-- consolidates SHA and HMAC code
		-- reduces size of object files
		-- thanks to Marc Lehmann for suggestions
	- tweaked Makefile.PL to show dependencies of SHA.c

5.82  Thu Jan 24 04:54:12 MST 2013
	- introduced workaround to SvPVbyte bug in Perl 5.6
		-- module behavior now consistent under all Perls 5.6+
			-- ref: new test script t/unicode.t
		-- SHA routines now always croak on wide chars (5.6+)
	- removed "static" message schedules from C code
		-- default "auto" is now just as fast
		-- thread-safe option (-t) no longer necessary
			-- still allowed, but ignored
		-- simplifies source and header files
			-- eliminates SHA_STO_CLASS and SHA_THREAD_SAFE
			-- ref. Bug #82784
		-- thanks to Steve Hay for initial patch
	- provided documentation to describe Unicode handling
		-- ref: Bug #82378
	- updated documentation of NIST statement on SHA-1


(wen)