Update the resolver in libc to BIND9's one.

Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc.  So,
res_sendsigned(3) is not merged into libc.

Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver.  They are not defined in resolv.h but defined in
res_update.h separately in BIND9.  Further, they are not called from
our tree.  So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).

Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h.  And, global variable _res_ext is removed.  It
breaks binary backward compatibility.  But, since it is not used from
outside of our libc, I think it is safe.

Reviewed by:	arch@ (no objection)

1 files changed, 2 insertions, 2 deletions

diff --git a/include/netdb.h b/include/netdb.h
index 2e7caae..9d1b005 100644
--- a/include/netdb.h
+++ b/include/netdb.h
@@ -87,7 +87,7 @@ typedef	__uint32_t	uint32_t;
 #define	_PATH_PROTOCOLS	"/etc/protocols"
 #define	_PATH_SERVICES	"/etc/services"
 
-#define	h_errno (*__h_error())
+#define	h_errno (*__h_errno())
 
 /*
  * Structures returned by network data base library.  All addresses are
@@ -257,7 +257,7 @@ void		setservent(int);
  */
 
 /* DO NOT USE THESE, THEY ARE SUBJECT TO CHANGE AND ARE NOT PORTABLE!!! */
-int	* __h_error(void);
+int	* __h_errno(void);
 __END_DECLS
 
 #endif /* !_NETDB_H_ */