external media not returning an error for bad non url input

[Robert Lyon]

Need additional check so that inputs that fail the url check should be checked for tag structure

So to test:

Should pass:

- http://youtu.be/vDy3NXVBQtI
- <iframe width="560" height="349" src="http://www.youtube.com/embed/vDy3NXVBQtI" frameborder=0></iframe>

Should fail:
- blahblah (random text)
- <iframe width="560" height="349" src="http://www.yo (incomplete tag structure)
-

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/3807

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/3807
Committed: http://gitorious.org/mahara/mahara/commit/ca009175b38c97c39be8abdf247c989de7111b79
Submitter: Aaron Wells (<email address hidden>)
Branch: master

commit ca009175b38c97c39be8abdf247c989de7111b79
Author: Robert Lyon <email address hidden>
Date: Thu Oct 16 11:45:46 2014 +1300

Add validation error for non url input (Bug #1381807)

Change-Id: I743d481c7775079c807e4e93b4bba4d39ceeb61d
Signed-off-by: Robert Lyon <email address hidden>

[Aaron Wells (u-aaronw)]

I don't think we're planning on backporting this one at the moment, but if anyone does backport it in the future, be aware that it introduced a regression: https://bugs.launchpad.net/mahara/+bug/1421444