UIDs: add glewlywed user and group

This does not unbreak the port, but brings it somemwhat nearer to
building.

The dependency devel/hoel still contains an incorrect USES line for
the MARIADB option, which causes a build failure, if enabled.

But the www/glewlywed port needs hoel with mariadb support, since
it unconditionally calls mariadb functions.

(It contains the unsupported USES=mariadb, while USES=mysql:105m
would be a working albeit inconvenient definition, since it includes
a fixed database version number, although any recent version would
do.)

I have informed the maintainer of the port a few days ago, but did
not get any response back. Due to multiple issues with the glewlywed
port (and its dependency devel/hoel), it cannot have been built from
the committed files before these were added to the ports tree.

Since the UID and GID additions will be required in any case and my
local patches to add them have lead to conflicts with other ports
taking the logically next ids, I'm taking liberty to commit those
UID and GID entries, now.

GIDs

@@ -243,7 +243,7 @@ backuppc:*:300:
 openvpn:*:301:
 netdata:*:302:
 onlyoffice:*:303:www
-# free: 304
+glewlwyd:*:304:
 # free: 305
 # free: 306
 # free: 307

UIDs

@@ -248,7 +248,7 @@ backuppc:*:300:300::0:0:BackupPC pseudo-user:/nonexistent:/usr/sbin/nologin
 openvpn:*:301:301::0:0:OpenVPN pseudo-user:/nonexistent:/usr/sbin/nologin
 netdata:*:302:302::0:0:NetData Daemon:/var/cache/netdata:/usr/sbin/nologin
 onlyoffice:*:303:303::0:0:Onlyoffice pseudo-user:/usr/local/www/onlyoffice/documentserver:/usr/sbin/nologin
-# free: 304
+glewlwyd:*:304:304::0:0:Glewlwyd SSO server:/nonexistent:/usr/sbin/nologin
 # free: 305
 # free: 306
 # free: 307