Merge in bind-4.9.4-P1 resolver...

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diff --git a/lib/libc/net/getnetent.3 b/lib/libc/net/getnetent.3
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-.\" Copyright (c) 1983, 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)getnetent.3	8.1 (Berkeley) 6/4/93
-.\"
-.Dd June 4, 1993
-.Dt GETNETENT 3
-.Os BSD 4.2
-.Sh NAME
-.Nm getnetent ,
-.Nm getnetbyaddr ,
-.Nm getnetbyname ,
-.Nm setnetent ,
-.Nm endnetent
-.Nd get network entry
-.Sh SYNOPSIS
-.Fd #include <netdb.h>
-.Ft struct netent *
-.Fn getnetent 
-.Ft struct netent *
-.Fn getnetbyname "char *name"
-.Ft struct netent *
-.Fn getnetbyaddr "long net" "int type"
-.Fn setnetent "int stayopen"
-.Fn endnetent 
-.Sh DESCRIPTION
-The
-.Fn getnetent ,
-.Fn getnetbyname ,
-and
-.Fn getnetbyaddr
-functions
-each return a pointer to an object with the
-following structure
-containing the broken-out
-fields of a line in the network data base,
-.Pa /etc/networks .
-.Bd -literal -offset indent
-struct	netent {
-	char		*n_name;	/* official name of net */
-	char		**n_aliases;	/* alias list */
-	int		n_addrtype;	/* net number type */
-	unsigned long	n_net;		/* net number */
-};
-.Ed
-.Pp
-The members of this structure are:
-.Bl -tag -width n_addrtype
-.It Fa n_name
-The official name of the network.
-.It Fa n_aliases
-A zero terminated list of alternate names for the network.
-.It Fa n_addrtype
-The type of the network number returned; currently only AF_INET.
-.It Fa n_net
-The network number.  Network numbers are returned in machine byte
-order.
-.El
-.Pp
-The
-.Fn getnetent
-function
-reads the next line of the file, opening the file if necessary.
-.Pp
-The
-.Fn setnetent
-function
-opens and rewinds the file.  If the
-.Fa stayopen
-flag is non-zero,
-the net data base will not be closed after each call to 
-.Fn getnetbyname
-or
-.Fn getnetbyaddr .
-.Pp
-The
-.Fn endnetent
-function
-closes the file.
-.Pp
-The
-.Fn getnetbyname
-function
-and
-.Fn getnetbyaddr
-sequentially search from the beginning
-of the file until a matching
-net name or
-net address and type is found,
-or until
-.Dv EOF
-is encountered.
-Network numbers are supplied in host order.
-.Sh FILES
-.Bl -tag -width /etc/networks -compact
-.It Pa /etc/networks
-.El
-.Sh DIAGNOSTICS
-Null pointer
-(0) returned on
-.Dv EOF
-or error.
-.Sh SEE ALSO
-.Xr networks 5
-.Sh HISTORY
-The
-.Fn getnetent ,
-.Fn getnetbyaddr ,
-.Fn getnetbyname ,
-.Fn setnetent ,
-and
-.Fn endnetent
-functions appeared in 
-.Bx 4.2 .
-.Sh BUGS
-The data space used by
-these functions is static; if future use requires the data, it should be
-copied before any subsequent calls to these functions overwrite it.
-Only Internet network
-numbers are currently understood.
-Expecting network numbers to fit
-in no more than 32 bits is probably
-naive.