fixed broken links

svn path=/branches/RC_1_33_0/boost/libs/crc/; revision=30386
Workaround for GCC 4.0.2

svn path=/branches/RC_1_33_0/boost/boost/crc.hpp; revision=31778
More cleanups

svn path=/branches/RC_1_33_0/boost/boost/crc.hpp; revision=31860