Increase timeout for noretries pool.

.1 seconds was too optimistic.
tdb_cassandra: Add support for SuperColumnFamily counters.
tdb_cassandra.Counter: Add _incr_multi.
tdb_cassandra: Let subclasses specify their own schema args.

Subclasses now inherit their parents' _extra_schema_creation_args
and can override them if desired.
Revert "Clean up usage_q infrastructure."
Modify /api/subscribe to accept "sr_name" param to support subscribing subreddits by name.
Add run.ini and srv/*/log/main/* to .gitignore
Modify /api/submit to return QUOTA_FILLED error when api_type=json.
Modify /api/new_captcha to return "iden" when api_type=json.
When api_type=json, return new captcha iden to caller when VCaptcha fails.
sharelink.html's share_from error field: "COMMENT_TOO_LONG" -> "TOO_LONG"
Use 'translated' English as a fallback translation

This avoids showing ugly strings such as "comment {verb}"
to end users
Typo in promotelinkform.html (large -> larger)
Fallback to the non-dialect version of a language

If a language dialect is used (such as pt-pt), and that
dialect is lacking a given translation, fallback
the the non-dialect (e.g., pt) translation, if there is one
Add translator notes to the random strings
Change type prefix for Cassandra votes.
Upgrade to Snudown 1.0.3.
Replace proxy_addr with option to trust proxies in 10.0.0.0/8.
Ignore mod bans when creating promoted links
Spruce up quota messages (wording courtesy of redtaboo).