inet/cc.h should be shipped

bloody% echo '#include <inet/ipclassifier.h>^Mmain(){}' >| c.c
bloody% gcc -o c c.c
In file included from /usr/include/inet/ipclassifier.h:41,
                 from c.c:1:
/usr/include/inet/tcp.h:49:10: fatal error: inet/cc.h: No such file or directory
 #include <inet/cc.h>
          ^~~~~~~~~~~
compilation terminated.