repair: build dirlogs using manifest, rather than repo shortcut method As before, this was rarely used, so let's get rid of the convenience method.

cmdutil: open dirlogs via manifest property, not via repo This was a convenience method that was rarely used, so let's get rid of it.

wirepeer: rename confusing `source` parameter It's named "url" everyplace else this method is defined, so let's be consistent.

develwarn: use the lock helper in local repo We have a helper function to know if a lock is taken. When checking lock usage we now use it instead of manually accessing the locks.