I found your server in first try. Refreshed 5 times and found the server allways again.
About this one:
sv_master goes only from 1-5.
6 - 10 doesnt exist.
gamespy doesnt exist anymore
clanservers.net doesnt exist and useless for masterlist ingame.
try out them:
set sv_master1 "etmaster.idsoftware.com"
set sv_master2 "master0.etmaster.net"
set sv_master3 "master3.idsoftware.com"
set sv_master4 "wolfmaster.idsoftware.com"
set sv_master5 "master3.idsoftware.com:27900"
even if i let it blank in my server i find the server in the masterlist, because it loads default settings.
default settings when nothing is loaded looks like
"sv_master1" is:"etmaster.idsoftware.com" default:"etmaster.idsoftware.com"
]sv_master2
"sv_master2" is:"" default:""
]sv_master3
"sv_master3" is:"" default:""
]sv_master4
"sv_master4" is:"" default:""
]sv_master5
"sv_master5" is:"" default:""
just set sv_master1 "etmaster.idsoftware.com" is important, the rest is all useless.