Allow setting of retransmission intervasl via _res.retrans. Ugly API but
it's all we got. ok jca@

Prefer _MUTEX_*LOCK over _THREAD_PRIVATE_MUTEX_*LOCK() when thread-specific
data isn't necessary.

ok mpi@, ok&tweak natano@

Initialize _res_ext.nsaddr_list alongside _res.nsaddr_list.
Fallback to initialization with 0 when _res.nsaddr_list is to small to hold an
IPv6 address.

OK bluhm@

Set the name server counter in __res_state correctly if a nameserver
from asr_ctx was skiped. Missed in previous commit.
OK deraadt@

When filling the __res_state compatibiliy struct, a long list of
nameservers could overflow the dns search pointers. Restrict the
number, size and address family of nameservers in res_init(3). This

When filling the __res_state compatibiliy struct, a long list of
nameservers could overflow the dns search pointers. Restrict the
number, size and address family of nameservers in res_init(3). This
fixes a crash in sendmail. Only programs that use the bind resolver
internals directly are affected.
OK deraadt@ millert@

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Wrap <resolv.h> so that internal calls go direct

ok millert@

Hide all unnecessary asr / resolver related API with _ prefixes.
direction & ok guenther

Make the asr API public. Install asr.h to /usr/include.h and manpages.
Include tweaks suggested by mpi@

ok deraadt@

Initialise _res.nsaddr_list in res_init(), fixing some programs which depend
on bind resolver internals. Note, the list will not be updated if resolv.conf
is changed while the program runs unless the

Initialise _res.nsaddr_list in res_init(), fixing some programs which depend
on bind resolver internals. Note, the list will not be updated if resolv.conf
is changed while the program runs unless the caller resets the RES_INIT flag.
Approach suggested by otto@, original diff from Kapetanakis Giannis, fix
suggested by tedu@ and dug up again by Riccardo Mottola. Looks ok to eric@.

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Add minimal support for _res setup and update.

Change res_init() to initialize the _res structure on first call, and
udpate the global async context if changes were made by the user. All
resolver fu

Add minimal support for _res setup and update.

Change res_init() to initialize the _res structure on first call, and
udpate the global async context if changes were made by the user. All
resolver functions now call res_init() internally.

fixes issue spotted by otto@

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split asr_resolver.c into different files to overlay the libc/net
resolver implementation.