Recently, caa81452f4 relaxed the condition for Snappy pinning a post
from `body.startswith(':#marseypin:')` to the same sans trailing colon.
I believe this was intended to allow :marseypin2: to also lead to post
pinning. However, the amusing, though incorrect, side effect is that
:marseypinkcat: and :marseypinochet: can now also lead to Snappy pins.
This has been remedied by explicitly defining the two conditions we
want rather than hoping all :marseypin [sic] are about pinning.
* Switch to marsey.cat for Snappy /u/.
camas is down, replacing it with search.marsey.cat.
Note that when looking for existing Snappy comments to test against,
it appears that something else with Snappy generation is broken.
Ex: /post/66263/-/1876803 puts an entire post URL in the author field.
This commit makes no attempt to fix this. TODO for later.
* Fix Snappy body /u/ extracting author from post URL.
Following up on 1137996f0fe7:
Issue was that author was being extracted from post.url, not href.
Given that the relevant code section is specifically for /u/s in the
body text of the submission, this was a problem.