Accepting request 289785 from home:pluskalm:branches:network

- Cleanup spec-file with spec-cleaner
- Do not generate config.example from README
  * add config.example as source
- Add unit file (nbd-server.service)
- Add sysconfig template (nbd-server.sysconfig)
- Add no-return-nonvoid.patch
- Update requirements
- Update to 3.9

OBS-URL: https://build.opensuse.org/request/show/289785
OBS-URL: https://build.opensuse.org/package/show/network:utilities/nbd?expand=0&rev=27

nbd-2.9.25-close.diff

@@ -1,8 +1,10 @@
---- nbd-2.9.25/nbd-client.c.orig	2012-01-05 15:40:31.962826124 -0500
-+++ nbd-2.9.25/nbd-client.c	2012-01-05 15:40:53.627555277 -0500
-@@ -70,6 +70,7 @@
- 	len=read(fd, buf, 256);
- 	buf[len-1]='\0';
+Index: nbd-3.9/nbd-client.c
+===================================================================
+--- nbd-3.9.orig/nbd-client.c
++++ nbd-3.9/nbd-client.c
+@@ -79,6 +79,7 @@ int check_conn(char* devname, int do_pri
+ 	}
+ 	buf[(len < 256) ? len : 255]='\0';
  	if(do_print) printf("%s\n", buf);
 +	close(fd);
  	return 0;