Description of problem:
When resolving hosts via NIS, there seems to be a problem resolving if the host's map entry contains multiple names for the host.

Version-Release number of selected component (if applicable):
glibc-2.9-2.i686

How reproducible:
You will need a working NIS domain. I have the following:
$ grep hosts /etc/nsswitch.conf 
hosts:      files nis dns

Steps to Reproduce:
1. 
Find a host with multiple hostnames in the NIS host map:
$ ypmatch monserv hosts
152.3.182.15		monserv.phy.duke.edu monserv loghost
Observe that name lookups fail for that host (just using wget as an example app since it's verbose):
$ wget monserv
Resolving monserv... failed: Name or service not known.
$ wget loghost
Resolving loghost... failed: Name or service not known.

Find a host with a simple NIS host entry:
$ ypmatch rhic00 hosts
152.3.182.72		rhic00.phy.duke.edu rhic00
Observe that it resolves correctly:
$ wget rhic00
Resolving rhic00... 152.3.182.72

2.
Disable NIS host resolution and observe that all hosts now work using DNS:
$ grep hosts /etc/nsswitch.conf
hosts:      files dns
$ wget monserv
Resolving monserv... 152.3.182.15
$ wget rhic00
Resolving rhic00... 152.3.182.72

Actual results:
NIS names resolution fails for multi name host entries

Expected results:
NIS resolution should work for multi name hosts in the same manner that the local file "/etc/hosts" does.

Additional info:
ypbind-1.20.4-8.fc10.i386
yp-tools-2.9-4.i386
kernel-2.6.27.5-113.fc10.i686
SELINUX=disabled