Merge RUN-PROCESS work from ferada, olof, pipping, et.al (was Re: run-program patch / better UIOP support)

[Mark Evenson]

> On 30 Aug 2016, at 20:51, Olof-Joachim Frahm <olof at macrolet.net> wrote:
> 
> Hi again,
> 
> after Elias mentioned his work on UIOP I've produced a small patch that
> improves compatibility with regards to process spawning quite a bit, see
> attached (or from [1]).  Missing is the option to pass in custom streams
> (which some other implementations support), as that's quite a bit more
> work with the `ProcessBuilder` interface and would require shuffling
> data back and forth in a separate thread perhaps.
> 
> For Windows compatibility (for `process-pid`) I'm a bit stumped how
> that'd work with standard Java, thus it's currently unsupported.

The code in [the ABCL swank implementation][1] represents my attempt at such
abstraction.  We should refactor into an EXT:PROCESS interface.

[1]: https://gitlab.common-lisp.net/slime/slime/blob/master/swank/abcl.lisp#L222


> 
> Best regards,
> Olof
> 
> [1]: https://github.com/Ferada/abcl/tree/run-more-programs
> <run-more-programs.patch>

Merged to <http://abcl.org/svn/trunk/abcl/>

[ferada]: https://gitlab.common-lisp.net/mevenson/abcl/commit/88dc72f1aec62ec05d4adc9512df21a273559722
[olof]: https://gitlab.common-lisp.net/mevenson/abcl/commit/bf8c4b69d9a61fae41c7b1d0b0602714b3ec6daf
[pipping]: https://gitlab.common-lisp.net/mevenson/abcl/commit/8bbee196b22735c0e7223c3b090568e21776d446