fix bug in including (and forwarding) files; all lines looked
like comments

fix auto-quoting screwup

clearly mark the version number as an alpha

restore # as comment symbol in .forward/:include:; extend -p flag;
remove = option (use V instead)

sendmail -p sets protocol

J option sets "search path" for .forward

dynamically allocate header fields (and more....); miscellaneous
cleanup (mostly comments)

correct list of must-be-quoted characters

don't auto-initialize host map if user has already done it

reverse sense of -f in K field

make years in $t be four digits; do case folding for DBM databases
in map.c if MF_MAPCASE set

make it use varargs/stdarg and vsprintf

add -f (fold case) flag to keyed database lookups

finish support for generalized maps

(partially) ANSI-fy it

try to do some syntax error corrections on errors in headers

*really* fix quoting in phrase part of addresses; eliminate #-style
commenting in :include: and .forward files (parenthesized comments
can be used instead)

some debugging hooks for -bt mode

fix a variety of small bugs noticed by bcx

security fixes: check mode and owner of qf files

fix bug in envp handling in main(); always put trailing dot on
results of MX lookups

a variety of bug minor bug fixes; add file locking when writing
to a UNIX file; strip out dangerous envariables

miscellaneous bug fixes from Bryan Costales and Craig Lant

represent arpa dates with four digit years instead of two digits

do clean connection closing on queue runs