Add documentation for MOH realtime fields

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@277452 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/realtime/mysql/musiconhold.sql

@@ -0,0 +1,19 @@
+CREATE TABLE musiconhold (
+	-- Name of the MOH class
+	name char(80) not null primary key,
+	-- One of 'custom', 'files', 'mp3nb', 'quietmp3nb', or 'quietmp3'
+	mode char(80) null,
+	-- If 'custom', directory is ignored.  Otherwise, specifies a directory with files to play or a stream URL
+	directory char(255) null,
+	-- If 'custom', application will be invoked to provide MOH.  Ignored otherwise.
+	application char(255) null,
+	-- Digit associated with this MOH class, when MOH is selectable by the caller.
+	digit char(1) null,
+	-- One of 'random' or 'alpha', to determine how files are played.  If NULL, files are played in directory order
+	sort char(10) null,
+	-- In custom mode, the format of the audio delivered.  Ignored otherwise.  Defaults to SLIN.
+	format char(10) null,
+	-- When this record was last modified
+	stamp timestamp
+);
+