avoid infinite loops if malloc fails

lint

update copyright notice

pull getpwXXX and gethostbyXXX calls out into conf.c so they can
be tweaked

buffer error messages during collect phase (better implementation)

avoid recursive calls to syserr if malloc fails

avoid dropping message submitted on stdin if the address resolves
to a $#error address with a tempfail code

avoid using %m in syslog calls because it conflicts with HP-UX

change NAMED_BIND to a 0/1 flag to allow Makefile override

fix CNAME loop problem: gave error messages and requeued messages

avoid having long "to" strinsg overflow the error message buffer

changes from Eric Wassenaar: Apollo portability and improved network
error handling

log user name on SYSERRs, since these can have security implications

restore -ba mode for UK Grey book

Unicos portability changes

fix problem that was causing the ctladdr of whoever ran the daemon
(usually root) to own the delivery process

fix botch with Name server: error codes

always include host name on DNS-related errors

improve error messages -- avoid "Error 0" syndrome

general portability changes

fix to error handling -- set error flags even if HoldErrs set
(this reverts to previous behaviour, except sets Errors on 6xx codes)

Errors++ any time an error message is actually printed

allow dumping of MCI cache to syslog for debugging

additional debugging information for too many open files problem