adding renice IFACE option

rrqnet-ifupdown.sh

@@ -19,6 +19,7 @@
 
 # An rrqnet stanza may have the following settings:
 # rrqnet_port <port>
+# rrqnet_renice <nice>
 # rrqnet_remote <remote declaration>
 # rrqnet_options <options>
 # rrqnet_log <level> <pathname>
@@ -53,6 +54,9 @@ start_cable_pre_up() {
 	       $RRQDAEMON ${IF_RRQNET_LOG%% *} $IF_RRQNET_OPTIONS \
 	       -t $IFACE $IF_RRQNET_PORT $IF_RRQNET_REMOTE
     fi
+    CHPID="$(cat /var/run/$NAME)"
+    [ -z "$RRQNET_RENICE" ] || [ -z "$CHPID" ] || \
+	renice -n "$RRQNET_RENICE" "$CHPID"
 }
 
 #function

rrqnet-ifupdown.sh.8.adoc

@@ -45,6 +45,11 @@ This IFACE option is required both as way of marking that the stanza
 is for an +rrqnet+ virtual cable +tap+, and to declare which UDP port
 the +rrqnet+ daemon should listen on for incoming cabling.
 
+*rrqnet_renice* _nice_::
+
+This IFACE option is used for adjusting the +rrqnet+ process
+scheduling priority. Refer the +renice+ man page for full details.
+
 *rrqnet_remote* _remote_::
 
 This IFACE option is used for declaring the remote connection details.