GitLab

Added MemCheck build capability.  Found and fixed a significant memory leak as a result of this, which would lose you whatever your MRU size was plus about another 130 bytes (for headers, FCS etc.) per pppconnect.

Version 1.20. Tagged as 'PPP-1_20'

Version 1.19. Not tagged

Got rid of a few more compilation warnings.

Added diallerb option to use DiallerB for serial stream handle
arbitration instead of dialler.

Removed ability for PPP to use Dialler/DiallerB for timeouts and line
drop detection - nothing used these and they have no advantages over
PPP's internal routines for doing the same.

Fixed bug in *command handler (overwriting command tail).  Got rid of a couple of warnings.  Added a doc directory containing some documentation and a history file.  See history file for more details.