refactor: preferred group is nogroup

Closes #48

contrib/beforeinstall.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 export USER="nobody"
-export GROUP="nobody"
+export GROUP="nogroup"
 getent passwd $USER || useradd $USER
 getent group $GROUP || groupadd $GROUP

template/server.conf.tmpl

@@ -249,7 +249,7 @@ comp-lzo
 # You can uncomment this out on
 # non-Windows systems.
 user nobody
-group nobody
+group nogroup
 
 # The persist options will try to avoid
 # accessing certain resources on restart