======Synopsis:======
[[on]] [<modes>]input [<serial#>] [-|^]<match> { <action> }

======Description:======
This hook is triggered whenever a command is entered on the input line,
or when text is sent to a channel or query.

This is a very powerful mechanism of the client.  Used intelligently,
it permits a very fine degree of control over the text entered on the
input line.  Used carelessly, and it can easily disable the client.
Use with caution.

If a silent hook is set, one can use a loaded script to do preprocessing
of the input line.

======Parameters:======
|$*   |text of input line entered |

======Examples:======
To emulate the [[set INPUT_ALIASES|INPUT_ALIASES]] setting:
   on ^input "*" {
      eval $*
   }