Glibc download location

[Chris Staub]

LFS builders in IRC are reporting on a daily basis that they cannot 
download the Glibc version listed in the book since that snapshot is no 
longer available at the redhat ftp site. The link in the book should 
point to the LFS ftp download site, 
ftp://ftp.lfs-matrix.net/pub/lfs/lfs-packages/development/glibc-2.8-20080929.tar.bz2. 
The location for Glibc needs to be changed in the dev book, and added to 
the Errata for 6.4.