Add Lua support for tracking conversations.

This issue was migrated from bug 15396 in our old bug tracker.

Original bug information:

Reporter: Christopher Maynard
Status: CONFIRMED
Product: Wireshark
Component: Dissection engine (libwireshark)
OS: All
Platform: All
Version: Git

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information