Issue #10708: Add a link to devguide in Misc/Porting.

Misc/Porting

-Q. I want to port Python to a new platform.  How do I begin?
-
-A. I guess the two things to start with is to familiarize yourself
-with are the development system for your target platform and the
-generic build process for Python.  Make sure you can compile and run a
-simple hello-world program on your target platform.  Make sure you can
-compile and run the Python interpreter on a platform to which it has
-already been ported (preferably Unix, but Mac or Windows will do,
-too).
-
-I also would never start something like this without at least
-medium-level understanding of your target platform (i.e. how it is
-generally used, how to write platform specific apps etc.) and Python
-(or else you'll never know how to test the results).
-
-The build process for Python, in particular the Makefiles in the
-source distribution, will give you a hint on which files to compile
-for Python.  Not all source files are relevant -- some are platform
-specific, others are only used in emergencies (e.g. getopt.c).  The
-Makefiles tell the story.
-
-You'll also need a pyconfig.h file tailored for your platform.  You can
-start with pyconfig.h.in, read the comments and turn on definitions that
-apply to your platform.
-
-And you'll need a config.c file, which lists the built-in modules you
-support.  Start with Modules/config.c.in.
-
-Finally, you'll run into some things that aren't supported on your
-target platform.  Forget about the posix module for now -- simply take
-it out of the config.c file.
-
-Bang on it until you get a >>> prompt.  (You may have to disable the
-importing of "site.py" by passing the -S option.)
-
-Then bang on it until it executes very simple Python statements.
-
-Now bang on it some more.  At some point you'll want to use the os
-module; this is the time to start thinking about what to do with the
-posix module.  It's okay to simply #ifdef out those functions that
-cause problems; the remaining ones will be quite useful.
+This document is moved to https://docs.python.org/devguide/faq.html#how-do-i-port-python-to-a-new-platform