[syslog-ng] [PATCH 0/1]: value-pairs key rewriting for 3.4

[Gergely Nagy]

The patch I'll be sending in a followup implements key rewriting for
syslog-ng 3.4. I wrote about this quite a bit in the past, and this
time, there are no functional changes - it's just the work I've done
so far merged into a single patch.

...and updated a bit, because during the merge, I discovered that the
transformations are not thread safe, so I took the opportunity to
convert them to scratch buffers too.

This, however, was done in a bit of a hurry, so I'm not entirely happy
with the result. Nevertheless, I'm submitting it as a single patch,
mostly so that it can be reviewed in its entirety.

I don't think it's ripe for a merge yet, there's a bit of work left to
done still, at least in the code part. The functionality itself is - I
believe - solid by now.

The former branch I worked on (feature/3.4/value-pairs/rekey) will be
deleted soon, as it does not contain the latest fixes I applied during
the commit merging process.

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