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db1cd8f881
In http_7239_extract_{ipv4,ipv6}, we declare a local buffer in order to
use inet_pton() since it requires a valid destination argument (cannot be
NULL). Then, if the caller provided <ip> argument, we copy inet_pton()
result (from local buffer to <ip>).
In fact when the caller provides <ip>, we may directly use <ip> as
inet_pton() dst argument to avoid an useless copy. Thus the local buffer
is only relevant when the user doesn't provide <ip>.
While at it, let's add a missing testcase for the rfc7239_n2nn converter
(to check that http_7239_extract_ipv4() with <ip> provided works properly)
This could be backported in 2.8 with b2bb925 ("MINOR: proxy/http_ext:
introduce proxy forwarded option")