295f127c2b
* add BACnet stack library at apps/lib * convert apps to use apps/lib for smaller binary * fix -DBACDL_ALL=1 build * fix piface build * datalink MAX_MPDU and MAX_HEADER cleanup * add bip6 to git workflow * fix system library dependency of BACnet library Co-authored-by: Steve Karg <skarg@users.sourceforge.net>