mod_wsgi docs for virtualenv uses WSGIPythonPath incorrectly

[Preston Holmes]

as near as I can tell this section of the docs is incorrect:

​https://docs.djangoproject.com/en/dev/howto/deployment/wsgi/modwsgi/#using-a-virtualenv

The docs suggest adding a line to the conf

however

​http://code.google.com/p/modwsgi/wiki/ConfigurationDirectives#WSGIPythonPath

stipulates that multiple locations be separated with a ':'

In my tests, using two lines will result in only the last line modifying the Python path, while using ':' works

I don't really use mod_wsgi much, so wouldn't mind someone validating this on another setup.

[Preston Holmes <preston@…>]

In 3abf6105b6c953c6feb28708b9903f583cb28438:

Fixed a couple errors and inconsistencies in mod_wsgi docs

Fixes #19042

[Claude Paroz <claude@…>]

In b4fb448f8387d92832fc70ac58de69c73d5f1729:

Fixed WSGIPythonPath instruction in deployment docs

Partial backport of 3abf6105b6 from master. Refs #19042.