[package] allow restarting of server process only and add a killcients

function (#6027)

git-svn-id: svn://svn.openwrt.org/openwrt/packages@18499 3c298f89-4303-0410-b956-a3cf2f4a3e73

net/sslh/patches/002-fork_fix.patch

@@ -0,0 +1,10 @@
+--- a/sslh.c
++++ b/sslh.c
+@@ -469,6 +469,7 @@
+ 
+       if (!fork())
+       {
++         close(listen_socket);
+          start_shoveler(in_socket);
+          exit(0);
+       }