allow comments on lines with meaning and fix spawn command parse so that brackets can be used

Signed-off-by: Mattias Andrée <maandree@operamail.com>
typo

Signed-off-by: Mattias Andrée <maandree@operamail.com>
edito

Signed-off-by: Mattias Andrée <maandree@operamail.com>
document textconf.conf

Signed-off-by: Mattias Andrée <maandree@operamail.com>