[LTP] [PATCH v2] network/lib6/getaddrinfo01: rewrite with the new API + use static hostnames

[Alexey Kodanev]

On 18.05.2021 12:14, Alexey Kodanev wrote:
> The test is now independent of various machine settings
> regarding the test host name as it adds predefined names
> and aliases to /etc/hosts file and restores it to its
> original state after completing the test.
> 
> This should fix the following failures:
> * when gethostname() returns an alias name that doesn't
>   match canonical name;
> * No AAAA record for the returned name from gethostname().
> 
> Addresses and names added to /etc/hosts are more or less
> unique, so that there are no conflicts with the existing
> configuration.
> 
> Also most of the duplicate code is now gone.
> 
> Signed-off-by: Alexey Kodanev <aleksei.kodanev@bell-sw.com>
> Reviewed-by: Petr Vorel <pvorel@suse.cz>
> ---

Adding missing v2 update suggested by Petr:
* description tag
* new check_addrinfo_badflags(const char *) to remove even more code
duplication.