Closes#4236
CMake now creates a header file in the build directory under the path "include/Globals.h" which just includes "src/Globals.h" with an absolute path. Then instead of adding "src/" to the include directories, it adds "include/".
#include "Globals.h" still works by including the build generated file and any other src-relative path will not work.
1. implement protocol message SendHeldItemChange
2. add save / load inventory equipped item slot in JSON
3. send held item slot message after player connect to server
Fixes#4189
* Added GetPacketId method to protocol, implemented for all protocols.
* Moved GetPacketID methods into a single file, alpha-sorted.
* Fixed 1.12.1 HandlePacket switch statement.
* Added SendLogin to the GetPacketId framework.
* Added SpawnObject to GetPacketId framework.
* Added missing sendEntityEquipment packet ID update for 1.12.1
* Added LeashEntity packet ID change to 1.12.1
* Alphabetized packet enum, added SpawnGlobalEntity to GetPacketId framework
* Fixed clang errors
* Indented cases, expanded comment for GetPacketId
* Changed dyslexic comment.
* Renaming changes:
* macro prefix "POLARSSL" -> "MBEDTLS"
* functions now prefixed with "mbedtls_"
* rename PolarSSL++ -> mbedTLS++
* rename polarssl submodule
* Use mbedtls' AES-CFB8 implementation.
* Add cSslConfig to wrap mbedtls_ssl_config
* Update cTCPLink and cBlockingSslClientSocket to use cSslConfig
* Use cSslConfig in cHTTPServer
* Use cSslConfig for cMojangAPI::SecureRequest
* CI Fixes
* Set -fomit-frame-pointer on the right target
