Change "smtpctl pause message <msgid>" to "smtpctl pause envelope <msgid>"
as documented.  Also allow to resume by msgid.
sort includes
indent
move declarations around
backport tweaks from openbsd
Change "backend-table-*" to "table-*" for external backends.
fix warnings
backport changes from cvs
simplify layout for table backends
remove obsolete files
fix overflow with IPv6 address
getopt.h -> unistd.h
fiw bogus warning on 32bit archs
include libpq-fe.h instead of postgresql/libpq-fe.h