[Issue 18220] Allow rt_trapexceptions to be set from the CLI

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18220

Seb <greensunny12 at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Allow trapexception to be   |Allow rt_trapexceptions to
                   |set from the CLI            |be set from the CLI

--