[Tile-serving] [osm2pgsql] Unnecessary inclusion of libdl (#141)

[apmon]

You can disable lua support by not having the dependent lua libraries installed. The configure script will then automatically disable the functionality instead of failing. There should also be a configure command line option to disable it.

Makes sense for the dependency to come in indirectly through lua and it not being necessary to link libdl directly into osm2pgsql.

If you can send in a pull request (for libdl and or nodecachefilereader), I can merge the changes to the build script.

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/141#issuecomment-42218211
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