======Synopsis:======
__input__      "<prompt>" <command> [<arguments>] \\
__input_char__ "<prompt>" <command> [<arguments>]

======Description:======
This command is primarily for use inside scripts.  It allows the client
to present the user with a visible prompt for specific commands.  This
can be used for interactive commands, for command confirmation, etc.
Multiple commands may be specified if surrounded with curly braces.

The variant __INPUT_CHAR__ words the same as __INPUT__, except it only takes a
single character.  The primary difference is that it does not require
that a carriage return be entered before executing the command; the first
keystroke will trigger it.

======Options:======
|-noecho    |stops the echoing of characters as they are typed    |

======Examples:======
To let a command ask for confirmation:
      input "Are you REALLY sure you want to do this? (y/n) " {
         if ( [$0] == [y] ) exec rm -rf *
      }

The basis for a simple paging mechanism:
      input_char "Press 'q' to quit, any other key to continue: " {
         unless ( [$0] == [q] ) {
            /* do whatever */
         }
      }

======Aliases:======
These commands are functionally equivalent to the $"..." expando.  In
truth, they supersede $"...".