res_fax: Comment out default settings from res_fax.conf.

Comment out many settings in res_fax.conf.sample. The defaults are set in
res_fax.c, so setting the same value in sample config does nothing but make
the sample config more fragile.

(closes issue ASTERISK-23231)
Reported by: David Brillert
Review: https://reviewboard.asterisk.org/r/3261/
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Merged revisions 409052 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 409053 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 409054 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@409055 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/res_fax.conf.sample

@@ -4,12 +4,12 @@
 ; Maximum Transmission Rate
 ; Possible values are { 2400 | 4800 | 7200 | 9600 | 12000 | 14400 }
 ; Set this value to the maximum desired transfer rate.  Default: 14400
-maxrate=14400
+;maxrate=14400
 
 ; Minimum Transmission Rate
 ; Possible values are { 2400 | 4800 | 7200 | 9600 | 12000 | 14400 }
 ; Set this value to the minimum desired transfer rate.  Default: 4800
-minrate=4800
+;minrate=4800
 
 ; Send Progress/Status events to manager session
 ; Manager events with 'call' class permissions will receive events indicating the
@@ -21,8 +21,8 @@ statusevents=yes
 ; modem capabilities
 ; Possible values are { v17 | v27 | v29 }
 ; Set this value to modify the default modem options.  Default: v17,v27,v29
-modems=v17,v27,v29
+;modems=v17,v27,v29
 
 ; Enable/disable T.30 ECM (error correction mode) by default.
 ; Default: Enabled
-ecm=yes
+;ecm=yes