Bug#18818 configure: No longer finds OpenSSL on Mac OS X
- Eval shrext_cmds variable before using it
- Moved from acinclude.m4 to openssl.m4 and zlib.m4 when merging 4.1 -> 5.0
config/ac-macros/openssl.m4:
Move from acinclude.m4
config/ac-macros/zlib.m4:
Move from acinclude.m4