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

======Description:======
This hook is triggered whenever the client receives an invitation to a
channel.

======Parameters:======
|$0    |nickname inviting the client to a channel   |
|$1    |channel invited to                          |

======Examples:======
Customizing the appearance of the invitation:
   on ^invite "*" {
      xecho -b $0 cordially invites you to $1
   }