Packet Type-2e (FSC-39.4) support:

For packet creation, the only difference (from Type-2+) is with packets created
from point nodes: the origNet field won't be set to 0xffff (as is the case with
FSC-48, Type-2+ packets). The auxNet field is now always set to the originating
net (ala Squish) when configured for Type-2+ packet generation.
When importing Type-2e (FSC-39) packets, the detected/logged packet type may be
reported as "2e" for valid "2+" packets. This is normal and expected when the
originating node is not a point and the auxNet field is 0.
The second set of orig/dest zone fields in a type 2e/2+ pkt header will
now be used when importing if the old/QM orig/dest zone fields are 0.
Also, the originating point field may now be imported even if the auxNet field
is not used (origNet != 0xffff).

New umask sbbsecho.ini configuration option (global), maybe used to over-ride
the default *nix file creation mode mask (077), similar to sbbs.ini.