Debian: fixes migrating from psql with password

Prevents a problem if migrating from a version without dbconfig to a version with dbconfig
and have a postgresql database with password access.

debian/bareos-database-common.config.in

@@ -57,6 +57,11 @@ if [ -r @scriptdir@/bareos-config-lib.sh ]; then
                         dbc_load_include="sh:/usr/lib/bareos/scripts/set_dbconfig_vars.sh"
                         # empty passwords require special treatment, see below
                         bareos_database_password=`get_database_password` || true
+                        # if password is given, set authmethod to password,
+                        # otherwise postgresql configuration will stay at default ident
+                        if [ "${bareos_database_password}" ]; then
+                            dbc_authmethod_user="password"
+                        fi
                     fi
                     ;;
                 *)