z/XDC: New Point-and-Shoot command: T

Update DBC-2108A adds T as a new Point-and-Shoot command. This is most useful when placed on the targeting operand of any branching (or jumping) instruction. It sets a temporary breakpoint at the branch's target.

One very good use case occurs when you have stepped into a loop, and you want to let the loop run to completion and recapture execution when the loop is completed or exited. This T shortcut lets you quickly and easily place traps at all of the loop's exit targets.

For more information, see the following topics in z/XDC's Built-In Help:
- HELP PASCMDS SYNTAX
- HELP PASCMDS INSTRUCTIONS
- HELP PASCMDS INSTRUCTIONS T-EXAMPLE