clear errno after trying to open the database list

drop STATIC

separate support for header vs envelope sender; if users are in the
database, map them to a canonical name (e.g., @CS.Berkeley.EDU) in header.

allow udbexpand to return temporary failure errors

give initialization a chance

allow for default UDB spec at compile time

set udb_dbname

fix misunderstanding of seq(R_CURSOR) semantics

more null pointer fixes

fix silly indirect-through-zero bug

delete remote implementation in lieu of better protocol

sin_len is non-compatible (but not required)

beginnings of implementation of options on UDB specifications

make it work with udbd server

fixes for user database and new config files

hash_open -> dbopen

date and time created 91/07/26 19:00:38 by eric