boolean
     PEAR_ChannelFile::setAlias
     ( 
    
     string
     $alias
    
     , 
     boolean
     $local
      = false
    
   )
   Set the suggested alias that users can use on the command-line as a shortcut access to this
   channel.  For instance, channel pear.php.net's alias is pear.
  
$alias
     The alias
$local
     
       determines whether the alias is in channel.xml or local.  If local, then
       this is the result of a pear channel-alias command.
      
returns success
throws no exceptions thrown
This function can not be called statically.