use authority cache, http url
clenaup Makefile
Revert "if cert signature verification fails, try without authority cache"

This reverts commit a3d1faf4215b3e79f284dd284f5dfdd229f471ca.
generalized support for unkeyed hashes
Merge branch 'browserid' of github.com:PADL/libbrowserid into browserid

Conflicts:
	libbrowserid/bid_authority.c
	libbrowserid/bid_verify.c
winlib: SHA algorithm agnostic fixes