Fix logic to build internal/external versions on management command

[stsewd]

We are building only external/internal versions if we pass the magic word external/internal

readthedocs.org/readthedocs/core/management/commands/update_repos.py

Lines 80 to 101 in 2a1b641

	elif version == INTERNAL:
	log.info('Updating all internal versions for %s', slug)
	for version in Version.internal.filter(
	project__slug=slug,
	active=True,
	uploaded=False,
	):
	build = Build.objects.create(
	project=version.project,
	version=version,
	type='html',
	state='triggered',
	)
	# pylint: disable=no-value-for-parameter
	tasks.update_docs_task(
	version.project_id,
	build_pk=build.pk,
	version_pk=version.pk,
	)
	elif version == EXTERNAL:

But we first check if version isn't None or different than all

readthedocs.org/readthedocs/core/management/commands/update_repos.py

Line 49 in 06a2e65

if version and version != 'all':

Meaning we never hit the internal/external elifs

We should just check for all these special values first.

Also, maybe add the same logic for the else in the bottom

readthedocs.org/readthedocs/core/management/commands/update_repos.py

Lines 85 to 91 in 06a2e65

	if version == 'all':
	log.info('Updating all versions')
	for version in Version.objects.filter(
	active=True,
	uploaded=False,
	):
	trigger_build(project=version.project, version=version)