* Parses/consumes QWK headers.dat files
  - No more to/from/subj length limits
  - Extensive header details transferred for each message
  - IP/hostname filters (.can files) are applied to appropriate header fields
  - Code cleanup in the QWK functions
* New functions to read/parse/search filter (.can) files as string lists
  - Performance boost - no need to open/read/close .can file for each message
* More thread-safe Message-ID retrieval/generation (ftn_msgid and get_msgid)
* Better Message-ID generation for misconfigured systems (e.g. no hostname)
! These changes require the latest smblib and xpdev libraries !