Debugger should support pipeTransport for attach

[gregg-miskelly]

The debugger currently only supports pipeTransport for launch. It should also support it for attach so that we can enable attach into a Docker container, or into other scenarios where we may want a pipe executable (SSH?). This is especially helpful for programming models that we don't yet support launch for.

[gregg-miskelly]

This issue was fixed in #798

[DustinCampbell]

@gregg-miskelly: You marked this as fixed in 1.5 but the PR you linked to is still outstanding.

[gregg-miskelly]

Oh, shoot, I thought we merged that PR ages ago.

[DustinCampbell]

Should I update the readme to remove that line?

[gregg-miskelly]

@DustinCampbell any objection if we merge the PR? We should either merge in 798, or take it out of the readme.

[DustinCampbell]

I don't mind as it's not invasive. It needs updating against master though.

[gregg-miskelly]

I will get Andrew to rebase it.

[gregg-miskelly]

#918 fixes this.