--DRT-trapExceptions is not documented

[dlangBugzillaToGithub]

Ali Cehreli (@acehreli) reported this on 2020-10-22T20:56:14Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=21339

Description

--DRT-trapExceptions=0 was introduced in dmd 2.080 but it is nowhere to be found on the dlang site:

  https://dlang.org/changelog/2.082.0.html#exceptions-opt

It would be nice to make sure all runtime switches are documented.

[dlangBugzillaToGithub]

acehreli commented on 2020-10-22T20:57:04Z

s/2.080/2.082