Force all headers other than "Globals.h" to be included with relative paths (#4269)

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.

src/HTTP/CMakeLists.txt

@@ -1,6 +1,3 @@
-project (Cuberite)
-
-include_directories ("${PROJECT_SOURCE_DIR}/../")
 
 SET (SRCS
 	EnvelopeParser.cpp

src/HTTP/HTTPServer.cpp

@@ -9,7 +9,7 @@
 #include "HTTPServerConnection.h"
 #include "HTTPFormParser.h"
 #include "SslHTTPServerConnection.h"
-#include "mbedTLS++/SslConfig.h"
+#include "../mbedTLS++/SslConfig.h"
 
 
 

src/HTTP/HTTPServer.h

@@ -11,8 +11,8 @@
 
 #include "../OSSupport/Network.h"
 #include "../IniFile.h"
-#include "mbedTLS++/CryptoKey.h"
-#include "mbedTLS++/X509Cert.h"
+#include "../mbedTLS++/CryptoKey.h"
+#include "../mbedTLS++/X509Cert.h"
 
 
 

src/HTTP/SslHTTPServerConnection.h

@@ -10,7 +10,7 @@
 #pragma once
 
 #include "HTTPServerConnection.h"
-#include "mbedTLS++/BufferedSslContext.h"
+#include "../mbedTLS++/BufferedSslContext.h"