This adds symbolic constants for per-connection CCID support; these are used
by subsequent patches.
Per-connection CCID support is available in the Linux kernel from v2.6.30-rc1
(7th April 2009) onwards, further information is available at:
* symbolic names are taken from include/linux/dccp.h,
* API documentation is in Documentation/networking/dccp.txt.
The patch also corrects the manner of using doxygen comments in the #defines.