lib,test: replace connection query() method with sync_exec{,_params}. The old generic name was deprecated in favor of the explicit synchronous with/without-params methods.
Wrap all close() calls in "ensure" blocks and simplify DB connection-making.
Document everything with YARD and fix some bugs along the way.
Stop pretending that we'll ever work with another DBMS.
Overhaul everything to get consistent error reports.
Replace 'account' with 'user' everywhere.
Implement user_exists() everywhere and use it to correct the console output.
Move domain removal into the plugins.
Way too many changes to mention. The 'rm' mode works now.
Add a bunch more crap and rewrite a bunch more crap. Now the 'rm' mode at least runs.
Fix typo in mv_plugin. Rename the 'rm' plugin classes with an 'Rm' suffix.
Begin building the framework to rename accounts. A pile of crap right now.