Merge remote-tracking branch 'security/topic/awelzel/topic/awelzel/208-http-mime-nested-v2'

* security/topic/awelzel/topic/awelzel/208-http-mime-nested-v2:
  MIME: Cap nested MIME analysis depth to 100

scripts/base/init-bare.zeek

@@ -2780,6 +2780,16 @@ export {
 } # end export
 
 
+module MIME;
+export {
+	## Stop analysis of nested multipart MIME entities if this depth is
+	## reached. Setting this value to 0 removes the limit.
+	const max_depth = 100 &redef;
+
+} # end export
+
+
+
 module MOUNT3;
 export {