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* Add Coccinelle usage: one for blacklisting, one for patch collectionColin Walters2017-03-302-0/+7
This is inspired by the [Coccinelle](http://coccinelle.lip6.fr/) usage in systemd. I also took it a bit further and added infrastructure to have spatches which should never apply. This acts as a blacklist. The reason to do the latter is that coccinelle is *way* more powerful than the regular expresssions we have in `make syntax-check`. I started with blacklisting `g_error_free()` directly. The reason that's bad is it leaves a dangling pointer. Closes: #754 Approved by: jlebon