Add cross-references between taxonomy_vocabulary_load() and taxonomy_vocabulary_machine_name_load()

Sounds reasonable. Just needs a patch -- probably good Novice project.

I think @see should be at the end of the doc header

I thought so too, but everywhere elsewhere in taxonomy.module @see is before @param, so I went with that. Not clear to me what the right thing to do is. (fix it everywhere?)

We're in the midst of cleaning up the Drupal 8 documentation so it conforms with our standards on this issue:
#1310084: [meta] API documentation cleanup sprint
The taxonomy module hasn't been done yet, and moving the @see to the end of the doc blocks is one of the cleanup tasks.

For this issue, please just do these functions right, and don't clean up the rest of the file. But if you're interested in cleaning up, you can join in the cleanup issue -- there are instructions there. :)

By the way, standards for how to do doc headers correctly are at:
http://drupal.org/node/1354

New patch with @see at the bottom

This looks correct. Thanks!

Looks good! Committed and pushed to 8.x and 7.x. Thanks.