Latest snapshot and glibc regex support

[Matthew Burgess]

Hi Jim,

A while ago Linux From Scratch added the '--without-included-regex' flag 
to grep's configure invocation in order to fix the behaviour of 'grep 
-i' (see http://wiki.linuxfromscratch.org/lfs/changeset/8688).

The latest snapshot passes all tests (apart from one skipped pcre test 
as we don't install pcre in LFS) without using that configure switch so 
I assume it's safe to drop now, especially given the massive amount of 
work Paolo and yourself have made to this area recently?

I'll note that the latest snapshot thinks that Glibc-2.11.1 still 
doesn't provide a working re_compile_pattern function.  I may take a 
look and see where about's the configure test for this feature is 
failing, unless you know off-hand about outstanding Glibc bugs in this 
area?  The reason I ask is that I'm wondering what your preference for 
distributors is; 1) use Glibc if possible, 2) use the internal 
lib/regex.c at all times or 3) you don't care and are happy to support 
either?

Thanks,

Matt.