Docs patch

[rkulagow]

Reviewing the docs in dbcheck makes me believe that the following should be applied. (I've certainly see chanid's greater than "x099")

diff --git a/mythtv/libs/libmythtv/dbcheck.cpp b/mythtv/libs/libmythtv/dbcheck.cpp
index 5664558..1873e8a 100644
--- a/mythtv/libs/libmythtv/dbcheck.cpp
+++ b/mythtv/libs/libmythtv/dbcheck.cpp
@@ -204,8 +204,8 @@ analog channels, us, us-cable, pal, etc.


 \section channel_table Channel Table (channel)
-The primary key, 'chanid' is generated by combining the source id with
-a unique number from 0 to 99.
+The primary key, 'chanid' is generated by multiplying the sourceid times
+1000 and adding the channel number to create a unique chanid.

 The 'channum' field contains the channel number to be input to jump
 to a channel.