Merge branch 'rs/no-openssl-compilation-fix-on-macos'

Build fix.

* rs/no-openssl-compilation-fix-on-macos:
  git-compat-util: fix NO_OPENSSL on current macOS

Author: gitster

git-compat-util.h

@@ -403,6 +403,7 @@ char *gitdirname(char *);
 
 #ifndef NO_OPENSSL
 #ifdef __APPLE__
+#undef __AVAILABILITY_MACROS_USES_AVAILABILITY
 #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
 #include <AvailabilityMacros.h>
 #undef DEPRECATED_ATTRIBUTE