Bin pointless INET_PATH_TOKEN

There is nothing mnemonic in the name 'INET_PATH_TOKEN' that would tell the
code reader that it simply means '/'.

Change-Id: I89ce72e8be5cf0ef2c66b23ad6e721ad49105648
Bin pointless INET_MARK_TOKEN

Change-Id: Id95a2bd8ba08e06284709a4c7fa2582382f8aeae
Bin pointless INET_HEX_ESCAPE

Change-Id: I72238e511c2fca4a4aba0be60b0f2d3b1f46e5c2
Kill FSYS_MAC which is for ancient non-OS X Mac

Change-Id: I51e91b97217507bcdca8c82f8a8683758d871185