* drop the openssl changes that were re-added in r16657
* update to current gnulib sha1 code
* re-add gnulib config header guard
* mark conffile
* use PKG_INSTALL
git-svn-id: svn://svn.openwrt.org/openwrt/packages@24776 3c298f89-4303-0410-b956-a3cf2f4a3e73