add -DNO_SECURITY so that it works on the internal Netscape builds as well

(which do have security, but which do not have a libmime with S/MIME code.)

lib/libmime/Makefile

@@ -68,7 +68,7 @@ endif
 
 INCLUDES 	+= -I./
 
-DEFINES += -DMOZILLA_30
+DEFINES += -DMOZILLA_30 -DNO_SECURITY
 
 #
 # Building the "mimefilt" executable, which reads a message from stdin and