This reverts commit 3be9787e.

This fixes an issue with erroneous float-to-int rounding that resulted in
truncation toward 0, causing a biased distribution.

On calling clear_redistered_biomes the registered_biomes table is cleared
by creating a new empty table, but the pointer is not updated to point to
the new one. So after calling more register_biome, the registered_biome
table always contains 0 items, which is an error. Instead, the table is
cleared by removing all its items so the pointer (minetest.registered_*)
remains valid.

It isn't needed anymore, sending ICraftDefManager over the network has been obsoleted
by protocol version 7.

Fix style, refactor assert, use '"' instead of "\"",
replace code duplicating craftGetItemName, rename iterators.

Split unit tests into separate files under src/unittest/
Give better unittest diagnostics
Clean up some code

fixed some mistakes and added in some new translations

As the fly mode option is avaiable in-game, this is not used anymore.

Move place_on check to before place_center_x/y/z displacement of p
Reduce displacement of p by place_center_x/y/z flags
to correctly position schematics

Also fix std::logic_error when server::DenyAccess() is used with only two arguments.

but not rename the container. Approved-By est31

Revert "m_active_object_messages is used like a queue. Use std::queue instead of std::list. Also rename to m_active_object_messages_queue"

This reverts commit 972d17ba.
The commit being reverted was unauthorized.  There had been no discussion,
review, or sign-off prior to submittal to upstream.

m_active_object_messages is used like a queue. Use std::queue instead of std::list. Also rename to m_active_object_messages_queue

Fix buffer size calculation for lacunarity < 1.0
Add guard against absurd noise parameters

Add support for Solaris and HP-UX
Search additional potential procfs locations for current executable

In worlds with many mods we can easily reach timeout, waiting for the server to start.

Fixes build, which has been broken for all platforms (except BSD?) since
grandparent 406d9ba8.
Thanks to @SmallJoker for pointing out a solution.

Change types for passed password from wstring to string, which removes converting
back and forth in most cases. Move the narrow_to_wide conversion, where its neccessary,
closer to irrlicht. Remove trailing spaces in guiPasswordChange.cpp. Make parameters for
translatePassword passed as const reference.