Integrate a large part of John Wojnaroski's 747 cockpit project.

Integrate a large part of John Wojnaroski's 747 cockpit project.

Erik Hofman:
This patch contains an update to net_ctrls.hxx that adds an extra 100 bytes
(or an equivalent of 25 (u)int32_t types) of reserved space. This could be
used to make the protocol forward and backward compatibel within a certain
scope. Be sure to read the instructions at the begining of the header file
when addinf new variables.