fix bug causing class backups to jump two tokens instead of one

lint-style cleanup

defer map open as long as possible

Solaris portability changes

prototype functions

AIX compatibility changes; clean up map initialization functions

cleanup for NIS maps

changes to merge alias and map implementations

first cut at merged map/alias implementation

use newstr for e_message consistently

don't write arbitrarily off the end of a buffer (ugh!)

fixes for problems causing mail to be both sent and rejected

fix some bogus messages being printed in mailq command

ANSI fixes

clean up error message printing, especially for deferred messages

compile problem -- dangling else

quote need not be in DELIMCHARS either

fix some problems with backslash handling

print more fields in printaddr

change remotename to use flag bits instead of individual parameters;
add a pstat parameter to return status information up

fix bug causing host\!user to be parsed as one token

don't dequote if there would be spaces left -- they will be
replaced by the SpaceSub character

return status information from map lookups and from there from
rewrite; this allows higher level code to queue if the name server is down

properly diagnose ruleset zero returning null vector

implement $&x for deferred macro expansion; some POSIX compatibility