[PATCH] getaddrinfo: Always allocate canonical name on the heap

[Joseph Myers]

I'm still seeing a localplt failure for strdup even after commit 
6257fcfd58479f6b7ae0fdde045b9ff144d543da.

https://sourceware.org/ml/libc-testresults/2017-q2/msg00276.html

(The strdup@plt reference is from gaih_inet.constprop.6, at least on 
x86_64.  It seems there is one plain strdup reference in 
sysdeps/posix/getaddrinfo.c.)

-- 
Joseph S. Myers
joseph@codesourcery.com