doc/wrs-developer-manual: add new minipc calls

Add a minipc calls added at commits:
[Feature: 1055] userspace/tools: add unrec command to rtu_stat
[Feature: 1055] userspace/tools: add learning command to rtu_stat

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

doc/wrs-developer-manual.in

@@ -1636,6 +1636,16 @@ the processes (excluding the @sc{rt} subsystem).
 
 	Called by @i{rtu_stat} when performing actions.
 
+@item rtud::learning_process
+
+	Called by @i{rtu_stat} to enable/disable learning process on a set
+	of ports.
+
+@item rtud::unrec
+
+	Called by @i{rtu_stat} to enable/disable dropping of frames which
+	destination MAC address does not match to present RTU rules.
+
 @item rtud::vlan_entry
 
 	Called by both @i{rtu_stat} and @i{wrs_vlans}. It is