- Remove usage of $shrext_cmds variable
   - Test for libs using all known library file endings


config/ac-macros/openssl.m4:
  Remove the usage of $shrext_cmds. instead test for all the library file
  endings we currently know, that is .a .so .sl and .dylib
config/ac-macros/zlib.m4:
  Remove the usage of $shrext_cmds. instead test for all the library file
  endings we currently know, that is .a .so .sl and .dylib