make it more obvious that ->address is stringified
Merge pull request #126 from msimerson/address

make it more obvious that ->address is stringified
Clearer config_dir() tests
Merge pull request #127 from jaredj/test_config_dir

Clearer config_dir() tests
Correct some spellification.
Merge pull request #128 from flimzy/spelification

Correct some spellification.
Move http_config into new plugins/config directory
Fix MANIFEST thinko
Add config/cdb plugin

Replaces Qpsmtpd::Config::get_qmail_map().  Not yet tested.
Remove use of config_cache in config/cdb
Use config/cdb instead of get_qmail_map
Rename config/cdb to config/qmail_cdb
Test config/qmail_cdb - tests do not pass yet
Provide test data for config/qmail_cdb tests
Remove tests for Qpsmtpd::Config::get_qmail_map()

Qpsmtpd::Config::get_qmail_map() is gone, tests are now in plugin_tests/config/qmail_cdb
Fix load_logging reading of plugin_dirs

load_logging() appears to have been modified to look only in config files
pointing to plugin directories. These won't normally exist, so instead I
modified plugin_dirs() to look in these files.  So plugin_dirs() will no longer
try to potentially call config plugins to find out where to find plugins.  e.g.
a chicken-and-egg problem is now gone.
Get rid of logic duplicated in plugin_dirs()