fixed failing auths to auth/vpopmaild, added tests

Apparently the format of vpopmaild responses has been expanded and the responses
are conditional.

* Replaced the 'sometimes works' eq comparison with a regexp that always works.
* added tests for all 3 vpopmail plugins
* added cram-md5 auth support to auth_vpopmaild.
Add travis-ci configuration file
doc fix: changed $TRACE_LEVEL to $TraceLevel
updated URL to new github repo
suppress log error when $user unset

test for and return earlier when a null sender is encountered.
Prevents using an undefined variable.
bump RAM from 50 to 75MB

necessary on my FreeBSD 8 amd64 system. I'm guessing higher requirements
will be the norm on 64 bit systems.
improve grammar, update logging instructions

updated instructions for setting loglevel to use config/loglevel instead
of editing lib/Qpsmtpd to set $TraceLevel
fixed POD formatting
added comments to logging config files
added tls comments to config/plugins
fixed spelling error, added spf code to notes
make sure $hook is defined before printing it

This prevents error messages about $hook being undefined in the logs
don't print GeoIP country if not defined

If we don't get a result from the lookup, all we know is that we didn't get a result. Maybe an error, maybe the IP not in the database.
prepend auth_flat plugin name to $note

Makes it much easier to figure out where that log entry came from.
Normalize #! lines on all plugins

find . -type f | xargs -n1 perl -pi.bak -0777 -e '$want = "#!perl -Tw"; s/\A#!.*\n/$want\n/; s/\A([^#])/$want\n\1/s'
POD corrections, additional tests, plugin consistency

on files in plugins dir:
  fixed a number of POD errors

  formatted some # comments into POD

  removed bare 1;  (these are plugins, not perl modules)
    most instances of this were copy/pasted from a previous plugin that had it

  removed instances of # vim ts=N ...
    they weren't consistent, many didn't match .perltidyrc

  on modules that failed perl -c tests, added 'use Qpsmtpd::Constants;'

Conflicts:

	plugins/async/check_earlytalker
	plugins/async/dns_whitelist_soft
	plugins/async/dnsbl
	plugins/async/queue/smtp-forward
	plugins/async/require_resolvable_fromhost
	plugins/async/rhsbl
	plugins/async/uribl
	plugins/auth/auth_checkpassword
	plugins/auth/auth_cvm_unix_local
	plugins/auth/auth_flat_file
	plugins/auth/auth_ldap_bind
	plugins/auth/auth_vpopmail
	plugins/auth/auth_vpopmail_sql
	plugins/auth/authdeny
	plugins/check_badmailfromto
	plugins/check_badrcptto_patterns
	plugins/check_bogus_bounce
	plugins/check_earlytalker
	plugins/check_norelay
	plugins/check_spamhelo
	plugins/connection_time
	plugins/dns_whitelist_soft
	plugins/dnsbl
	plugins/domainkeys
	plugins/greylisting
	plugins/hosts_allow
	plugins/http_config
	plugins/logging/adaptive
	plugins/logging/apache
	plugins/logging/connection_id
	plugins/logging/transaction_id
	plugins/logging/warn
	plugins/milter
	plugins/queue/exim-bsmtp
	plugins/queue/maildir
	plugins/queue/postfix-queue
	plugins/queue/smtp-forward
	plugins/quit_fortune
	plugins/random_error
	plugins/rcpt_map
	plugins/rcpt_regexp
	plugins/relay_only
	plugins/require_resolvable_fromhost
	plugins/rhsbl
	plugins/sender_permitted_from
	plugins/spamassassin
	plugins/tls
	plugins/tls_cert
	plugins/uribl
	plugins/virus/aveclient
	plugins/virus/bitdefender
	plugins/virus/clamav
	plugins/virus/clamdscan
	plugins/virus/hbedv
	plugins/virus/kavscanner
	plugins/virus/klez_filter
	plugins/virus/sophie
	plugins/virus/uvscan
Make plugin syntax checks run with -T
added pod DESC to dont_require_anglebrackets
whitespace, copyright bump, simplify logic
applied greylisting NFSLock patch

Issue #1 on Google issue tracker. The patch was 'accepted' by Ask in 2007, but never applied.