nss-mdns is a plugin for the GNU Name Service Switch (NSS) functionality
of the GNU C Library (glibc) providing host name resolution via
Multicast DNS (aka Zeroconf, aka Apple Rendezvous, aka Apple Bonjour),
effectively allowing name resolution by common Unix/Linux programs in
the ad-hoc mDNS domain .local.

nss-mdns provides client functionality only, which means that you have to run
a mDNS responder daemon separately from nss-mdns if you want to register
the local host name via mDNS.

It is necessary to change "hosts" in /etc/nsswitch.conf to
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4

For using a 32 bit browser on x86_64,
the 32 bit version of nss-mdns must be also installed.