Previously username suggester would give up after 100 attempts at getting
a username and fallback to random string.
This amends the logic so we do all the work of figuring out a good username
in SQL and avoids a large amount of queries in cases where a lot of usernames
were used up.
This corrects an issue on sites with large numbers of anon users
v8 forking is not supported and can lead to memory leaks.
This commit handles the most common case which is the unicorn master forking
There are still some cases related to backup where we fork, however those
forks are usually short lived so the memory leak is not severe, burning
the contexts in the master process could break sidekiq or web process that
do the actual forking
Use the cooked version of the post and the quote to compare their content in
order to take into account the "typographer" option of the markdown pipeline.
Previously external domains were allowed in the client-side redirects, but not the server-side redirects. Now the behavior is to only allow local origins.
We recently noticed a leak, this introduces a new method on MiniRacer::Context
```
context.write_heap_snapshot(path)
```
To dump current memory in v8 context to a file, this can then be analyzed
in chrome and other similar tools
Can be triggered in production using rbtrace
User.publish_notifications_state is called every time a notification is
created, this can become a very critical code path.
On some heavy notification related sites this can be a major CPU user on PG
This index makes it much cheaper to publish notification state, cause a
simple index lookup does the trick.
Previously enable s3 uploads and s3 upload bucket were not shadowed.
This caused confusion when people were configuring stuff via env cause most
of s3 settings are shadowed.
We were blocking user registrations with same username and password,
but allowing usernames to be changed to be same as password later.
Also disallow names to be the same as password.
