Update to commit 85a2de04 (2 years ago).

FSC-74 specifies:
"The conference name shall be no more than 60 characters in length."

SCFG was limiting sub and dir area-tags to 40 chars and SBBSecho was limiting
area tags to 50 chars in length.

FSC-74 isn't a standard, but lacking this detail in FTS-4 and considering it
comes from the same authoritative source (the Conference Mail System User
Manual), I think it's the best source of truth we have.

Also, since we're no longer using .cnf files, we don't need different max
area-tag lengths between SBBSecho and SCFG structs - they all now use the same
macro: FIDO_AREATAG_LEN