MIN is an aggregate function on MySQL

Closes: FS-5218 (Thanks to Nathan Neulinger for the patch)
examples for the ext-voicemail and ext-redial options to mod_skinny sample conf

Closes: FS-5227 (Thanks to Nathan Neulinger for the patch)
mod_skinny parses and modifies odbc url, breaking it, but also doesn't use the resulting vars

Closes: FS-5224 (Thanks to Nathan Neulinger for the patch)