[PATCH] use protocol defined in server-list.db for mirror communication

["Peter Müller" <peter.mueller@link38.eu>]

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For each mirror server, a protocol can be specified in the
server-list.db database. However, it was not used for the
actual URL query to a mirror before.

This might be useful for deploy HTTPS pinning for Pakfire.
If a mirror is known to support HTTPS, all queries to it
will be made with this protocol.

This saves some overhead if HTTPS is enforced on a mirror
via 301 redirects. To enable this, the server-list.db
needs to be adjusted.

Partially fixes #11661.

Signed-off-by: Peter Müller <peter.mueller(a)link38.eu>
Cc: Michael Tremer <michael.tremer(a)ipfire.org>
---
 src/pakfire/lib/functions.pl | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/pakfire/lib/functions.pl b/src/pakfire/lib/functions.pl
index c97d4254d..94f9f1826 100644
--- a/src/pakfire/lib/functions.pl
+++ b/src/pakfire/lib/functions.pl
@@ -171,8 +171,11 @@ sub fetchfile {
 			}
 		}
 
+		# Use specified protocol for mirror communication (allows HTTPS pinning)
+		my $urlproto = lc $proto;
+
 		$final_data = undef;
-	 	my $url = "http://$host/$file";
+	 	my $url = "$urlproto://$host/$file";
 		my $response;
 		
 		unless ($bfile =~ /^counter.py\?.*/) {
-- 
2.13.6