- 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