[Tile-serving] [osm2pgsql] middle-pgsql fails to escape special characters (#247)

[Sarah Hoffmann]

`escape` is set to 1 when `escape_tag()` is used for escaping stuff for copy mode and set to 0 when escaping for an `INSERT` statement. These are all escapes for array lists. Oddly enough, there is code [here](https://github.com/openstreetmap/osm2pgsql/blob/master/middle-pgsql.cpp#L251) that decodes slash + character into the special characters when reading from the database. It is all rather confusing.

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/247#issuecomment-68796449
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