Fix typo in confbridge.conf.sample

The denoise filter requires func_speex, not codec_speex.  Fix this in the
description of the denoise=yes option in confbridge.conf.
........

Merged revisions 398820 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@398821 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/confbridge.conf.sample

@@ -109,7 +109,7 @@ type=user
 
 ;denoise=yes ; Sets whether or not a denoise filter should be applied
              ; to the audio before mixing or not.  Off by default. Requires
-             ; codec_speex to be built and installed.  Do not confuse this option
+             ; func_speex to be built and installed.  Do not confuse this option
              ; with drop_silence.  Denoise is useful if there is a lot of background
              ; noise for a user as it attempts to remove the noise while preserving
              ; the speech.  This option does NOT remove silence from being mixed into