The purpose of this function is to check if a configuration file exists
and has at least one entry which is not a comment.
Use this when building the list of profiles where the user can copy
configuration from, to avoid listing profiles with empty files or files
with only comments.
Change-Id: If45f52025959818fb1213ffac488cd59441e9fce
Reviewed-on: https://code.wireshark.org/review/30113
Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
