basicheaders: adding missing semicolon, fixed POD error
delete 3 relay plugins
new relay plugin, with tests!

replaces functionality of previous 3 relay plugins
relay: added note to UPGRADING, dates to plugin author
relay: use IETF IP testing addresses
another test tweak, for switching from 192.168 to 192.0
relay: update MANIFEST
make SPF level 2 a little more lenient
auth: eval 'use' so plugins can be enabled by default

and tested.
auth_vpopmail_sql test, eval 'use DBI' before testing
checkpassword: remove newlines that appeared
auth: adding tests (should have attached with a previous commit)
p0f: POD improvements
fix typo
new karma plugin
restore validate_password test

not sure how/why that got removed, but it wasn't intentional
comment out vpopmail/checkpasswd plugins in config
added new t/config directory, with developer tests

run when $ENV{QPSMTPD_DEVELOPER} is set

plugins file is same as in config.sample, but with more stuff enabled
added plugin name that uses them to the config files
added note in file telling which plugin uses it