BaseRtpEndpoint: Add doc text to config file
-;minPort=50000
-;maxPort=55000
+;; Port range for incoming RTP streams.
+;;
+;; These two parameters define the minimum and maximum ports that Kurento Media
+;; Server will open (bind to) in order to receive RTP packets from remote peers.
+;; This affects the operation of both RtpEndpoint and WebRtcEndpoint.
+;;
+;; * Unit: port number.
+;; * Default: [1024..65535]. This is the whole range of non-privileged ports.
+;minPort=1024
+;maxPort=65535
;; Maximum Transmission Unit (MTU) used for RTP.
;;
