mod_lua: Redesign the table construction/access mechanism, so we pass on a struct with the request_rec, the table pointer and the table name instead of just the table pointer. This allows us to use the request_rec for logging/editing purposes, as well as inform the user which exact table in the request_rec was modified.

Remove unneeded exports from mod_lua.

Moved header protection to the top.

Use a mutex to control read/write for IVM values, so we can reuse the existing structures without running into race conditions. This should get rid of the need to have MaxConnectionsPerChild set to > 0. If a new value is set and is a string, we either use the existing varbuf or grow it accordingly.

use ap_varbuf instead of allocating new strings each time we override an old one. This uses leaks less memory, but it's still not perfect (but it's a start - maybe I need to use a mutex for this, to override the original object without running into race conditions)

Remove lua_ap_banner, as it's no longer being used. Add ivm_get/ivm_set for Inter-VM data transfer. This allows multiple VMs across a process to share data without having to resort to external databases or filesystems. This is a work in progress, and I have yet to work out a proper way of resetting a variable without causing a memory leak (this could be done by allocating a new pool for each object, but I'm trying to see if there's a more efficient way). Comments, ideas etc are most welcome.

Mop up more than a dozen const'ness faults

push_connection, push_server also targetted for export, no?

fix symbol space and exports

Reformat mod_lua according to the HTTP Server Project C Style Guide: <http://httpd.apache.org/dev/styleguide.html> No functional changes.

Rename all files in mod_lua to have a lua_ prefix, as things like 'config.h' are way to generic and will often conflict with other include files.