[PATCH] Fix dl-environ.c

[Ulrich Drepper]

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Roland McGrath wrote:
> D'oh!  I don't see why that should be avoiding normal string routines,
> so I instead just snarfed the loop from the vanilla unsetenv, which
> does the same but using strncmp.

The reason it is not using srncmp is that this is the only use of 
strncmp in ld.so and it's not time-critical.  For a simple-minded inline 
function is better.

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