gpg: keyserver option 'no-try-dns-srv' is unknown

[ccdd13]

shown when try to encrypt/decrypt text message

$ uname -a
Linux mx1 4.19.0-9-amd64 #1 SMP Debian 4.19.118-2 (2020-04-29) x86_64 GNU/Linux

duraconf/configs/gnupg/gpg.conf

Lines 57 to 58 in 04f992c

	# Don't leak DNS, see https://trac.torproject.org/projects/tor/ticket/2846
	keyserver-options no-try-dns-srv

[ccdd13]

does no-try-dns-srv need packages to install?