Switch config quirks from '|' to '+' to be consistent with other config

Switch config quirks from '|' to '+' to be consistent with other config
items.

With previous conf_load changes, space within [] are allowed, so class
and name can appear as-is.

Switch config file and man page to match.

Old behavior still allowed for compat with existing configs out there,
but not documented anywhere.

Prodding by marco for the first bit, at least.