Fix curl dll not getting installed when sound is disabled
Connection: Stop processing malformed packet when encountered
Merge remote-tracking branch 'minetest/master'

Conflicts:
	src/connection.cpp
Clean up, add documentation
Move hotkey to keysettings
Leveled fall fix
Tune
Falling fix
Merge branch 'master' into next

Conflicts:
	src/clientserver.h
Convert chat messages to utf-8.