[[!comment format=mdwn
 username="joey"
 subject="""comment 4"""
 date="2017-05-25T21:52:37Z"
 content="""
The .git/config concurrent access happens because the remote
list is only generated on demand, and nothing demands it when running with
-J until all the threads are spun up and each thread has its own state
then, so each generates the remote list.

There don't look to be any other git-config settings that
would cause problems for concurrency other than ones run while
generating the remote list.

So, generating the remote list before starting concurrent threads
would avoid that problem, and also leads to a slightly faster startup
since the remote git config only has to be read once, etc.

The only risk in doing that would be if generating a Remote
opens some kind of handle, which can't be used concurrently, or
is less efficient if only opened once and then used by multiple threads.

I've audited all the Remote.*.gen methods, and they all
seem ok. For example, Remote.External.gen sets up a worker pool
of external special remote processes, and new ones are allocated as needed.
And Remote.P2P.chainGen sets up a connection pool.

Ok, gone ahead with this fix.
"""]]