A git repository is marked as signed if it contains the query "signed"
as defined by https://tools.ietf.org/html/rfc3986
Adds two utility functions in util/source.sh.in to extract fragments and
queries, and modifies source/git.sh.in to use them.
Signed-off-by: Eli Schwartz <eschwartz93@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>
