[Bug 1888047] [NEW] libnss-mdns slow response

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mdns responses are very slow which degrades the preformance of some
services in my lan due to this long delay. Please see the log below:

rumen at sirius:~/indigo.git$ time nslookup sirius.local
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	sirius.local
Address: 192.168.11.109
Name:	sirius.local
Address: 172.17.0.1
Name:	sirius.local
Address: fe80::7afb:484a:7307:cf6


real	0m5,224s
user	0m0,008s
sys	0m0,008s
rumen at sirius:~/indigo.git$ time nslookup dir.bg
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	dir.bg
Address: 194.145.63.12


real	0m0,035s
user	0m0,012s
sys	0m0,006s
rumen at sirius:~/indigo.git$ cat /etc/resolv.conf 
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0
search www.tendawifi.com
rumen at sirius:~/indigo.git$ cat /etc/nsswitch.conf 
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         files systemd
group:          files systemd
shadow:         files
gshadow:        files

hosts:          files mdns4_minimal [NOTFOUND=return] dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis
rumen at sirius:~/indigo.git$

** Affects: nss-mdns (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: libnss-mdns
-- 
libnss-mdns slow response
https://bugs.launchpad.net/bugs/1888047
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