Use nscd service files from glibc sources and make the service forking

Currently the nscd service is installed in systemd as a simple
service, which means that it is able to handle its own errors and does
not quit.  Since nscd does not fit that description, i.e. it can exit
on errors like, say, failing to parse nscd.conf, it should be declared
as forking instead.

glibc-rh1070416.patch

@@ -0,0 +1,41 @@
+diff --git a/nscd/nscd.service b/nscd/nscd.service
+index 99c7563..a970186 100644
+--- a/nscd/nscd.service
++++ b/nscd/nscd.service
+@@ -2,17 +2,20 @@
+ 
+ [Unit]
+ Description=Name Service Cache Daemon
++After=syslog.target
+ 
+ [Service]
+-Type=simple
+-ExecStart=/usr/sbin/nscd --foreground
++Type=forking
++ExecStart=/usr/sbin/nscd
+ ExecStop=/usr/sbin/nscd --shutdown
+ ExecReload=/usr/sbin/nscd -i passwd
+ ExecReload=/usr/sbin/nscd -i group
+ ExecReload=/usr/sbin/nscd -i hosts
+ ExecReload=/usr/sbin/nscd -i services
++ExecReload=/usr/sbin/nscd -i netgroup
+ Restart=always
+ PIDFile=/run/nscd/nscd.pid
+ 
+ [Install]
+ WantedBy=multi-user.target
++Also=nscd.socket
+diff --git a/nscd/nscd.socket b/nscd/nscd.socket
+new file mode 100644
+index 0000000..7e512d5
+--- /dev/null
++++ b/nscd/nscd.socket
+@@ -0,0 +1,8 @@
++[Unit]
++Description=Name Service Cache Daemon Socket
++
++[Socket]
++ListenDatagram=/var/run/nscd/socket
++
++[Install]
++WantedBy=sockets.target