[Coquelicot] Some patches

[ng]

> Recently I found time to track down a file descriptor leaking bug in
> coquelicot that annoyed us for a while. Essentially at least every 404
> leaked some FDs on the @path/.lock path.

it seems that my fix only helped partially and this is also due to a
problem in the lockfile library itself:

Applying this patch seems to get rid off the leaking FDs completely in
the end.

https://github.com/ahoward/lockfile/pull/13/commits/27c0f5b291211d1e5d8b8d2787e41dde98b3a66f

best

ng

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