Defines starting with `c' in kern

• CC kern/tty.c:90
• CCLASSMASK kern/tty.c:86
• CCPU_SHIFT kern/kern_synch.c:154
• CD9660_VFSOPS kern/vfs_conf.c:139
• COMPAT_OLDSOCK kern/uipc_syscalls.c:54
• CR kern/tty.c:91