Empty options yield to a warning

Some configuration files have empty options, such as in espeak-generic.conf

GenericPunctNone ""

which yields to

Missing argument to option 'GenericPunctNone'

This is actually an issue in dotconf itself: https://github.com/williamh/dotconf/issues/5

Start with the empty option example in espeak-generic.conf and compare it with the warning produced for GenericPunctNone "". Read the linked dotconf issue to understand the reported parser behavior and determine whether the fix belongs in speechd or dotconf. Done means empty options no longer produce the missing-argument warning.

Written by the indexing model from the issue text.