No Issue - Fix building ldap on MacOS. Discovered this problem building Epyrus on MacOS, based on this Mozilla Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1652906

ldap/c-sdk/liblber/lber-int.h

@@ -85,7 +85,7 @@ extern "C" {
 /* #  include <sys/varargs.h> */
 #  include <sys/socket.h>
 #  include <netinet/in.h>
-#if !defined(XP_OS2) && !defined(DARWIN)
+#if !defined(XP_OS2)
 #  include <unistd.h>
 #endif
 # endif /* defined( _WINDOWS ) */