Description: add Documentation key to the systemd service
 Adapted from upstream commit 70bbc0e7a54c796d60164e85664c4d26f547dfb4
Author: Damyan Ivanov <dmn@debian.org>
Forwarded: yes

--- a/builds/install/arch-specific/linux/firebird-superserver.service.in
+++ b/builds/install/arch-specific/linux/firebird-superserver.service.in
@@ -2,6 +2,7 @@
 Description=Firebird Database Server ( SuperServer )
 After=syslog.target network.target
 Conflicts=firebird-classic.socket
+Documentation=https://firebirdsql.org/en/firebird-rdbms/
 
 [Service]
 User=firebird