[PATCH] Add LD_PRELOAD_INIT_EARLY [BZ #14379]

[Joseph Myers]

This patch is missing a NEWS update to discuss the new feature.  (It seems 
the manual generally lacks documentation of LD_* variables; if they were 
documented, an update there would be needed as well.)

The commit message needs to discuss security issues (that applies to any 
proposed change to glibc that makes its behavior depend on some 
environment variable, probably we should add that point to the 
contribution checklist).  What effect does this have in setuid programs?  
Is it ignored, by existing or new code?  If not ignored, how can you 
demonstrate that to be safe in all cases where LD_PRELOAD is handled and 
safe for such programs?

(To confirm for anyone else looking at the patch: there is an FSF 
copyright assignment on file from Axis Communications, for a list of 
projects including glibc, dated 1999-05-28.)

-- 
Joseph S. Myers
joseph@codesourcery.com