Core/Misc: Explicitly include required headers instead of relying on them to be included by other headers

src/server/shared/DataStores/DB2DatabaseLoader.cpp

@@ -21,6 +21,7 @@
 #include "DB2Meta.h"
 #include "Errors.h"
 #include "Log.h"
+#include <cstring>
 
 DB2LoadInfo::DB2LoadInfo(DB2FieldMeta const* fields, std::size_t fieldCount, DB2Meta const* meta, HotfixDatabaseStatements statement)
     : DB2FileLoadInfo(fields, fieldCount, meta), Statement(statement)

src/server/shared/Packets/ByteBuffer.cpp

@@ -22,6 +22,7 @@
 #include "Util.h"
 #include <utf8.h>
 #include <sstream>
+#include <cmath>
 #include <ctime>
 
 ByteBuffer::ByteBuffer(MessageBuffer&& buffer) : _rpos(0), _wpos(0), _bitpos(InitialBitPos), _curbitval(0), _storage(buffer.Move())