nfs/module-setup.sh: combine egreps for /etc/passwd and /etc/group

modules.d/95nfs/module-setup.sh

@@ -62,12 +62,8 @@ install() {
 
     # Rather than copy the passwd file in, just set a user for rpcbind
     # We'll save the state and restart the daemon from the root anyway
-    egrep '^nfsnobody:' /etc/passwd >> "$initdir/etc/passwd"
-    egrep '^rpc:' /etc/passwd >> "$initdir/etc/passwd"
-    egrep '^rpcuser:' /etc/passwd >> "$initdir/etc/passwd"
-    #type -P nologin >/dev/null && dracut_install nologin
-    egrep '^nobody:' /etc/group >> "$initdir/etc/group"
-    egrep '^rpc:' /etc/group >> "$initdir/etc/group"
+    egrep '^nfsnobody:|^rpc:|^rpcuser:' /etc/passwd >> "$initdir/etc/passwd"
+    egrep '^nogroup:|^rpc:|^nobody:' /etc/group >> "$initdir/etc/group"
 
     # rpc user needs to be able to write to this directory to save the warmstart
     # file