output to remove consoles. The prototypes added to logger.h still need
doxygen documentation, as well.

- Add the new command line option to the man page
- make the mute option a flag instead of an int since it is only a binary
  option
- remove useless extern keywords for prototypes added to logger.h
- rename ast_console_mute() to ast_console_toggle_mute() since that is what
  it actually does
- actually apply the mute option to newly created remote consoles instead of
  only working when the CLI command is used
- don't imply the NO_FORK option if the mute command line option is provided
- place the new CLI command in the correct place in the list which has to be
  in alphabetical order
- Finally, clean up a few spacing issues to conform to the coding guidelines


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@30630 65c4cc65-6c06-0410-ace0-fbb531ad65f3