Allow targets to specify Compat[ible] payloads

Author: jvazquez-r7

lib/msf/core/module.rb

@@ -449,6 +449,9 @@ def compatible?(mod)
       ch = self.compat['Nop']
     elsif (mod.type == MODULE_PAYLOAD)
       ch = self.compat['Payload']
+      if self.respond_to?("target") and self.target['Payload'] and self.target['Payload']['Compat']
+        ch.merge!(self.target['Payload']['Compat'])
+      end
     else
       return true
     end