Bug#993654: Replace deprecated 'which' with 'command -v'

[積丹尼 Dan Jacobson]

Package: ucf
Version: 3.0043

>>>>> "gh" == gregor herrmann <noreply at salsa.debian.org> writes:
gh> Control: tag -1 pending

gh> Hello,

gh> Bug #993654 in libxml-sax-perl reported by you has been fixed in the
gh> Git repository and is awaiting an upload. You can see the commit
gh> message below and you can check the diff of the fix at:

gh> https://salsa.debian.org/perl-team/modules/packages/libxml-sax-perl/-/commit/43330f716f58062a0fbb629054dc8e9459753cda

gh> ------------------------------------------------------------------------
gh> Replace deprecated 'which' with 'command -v' in maintainer script(s).

gh> Note that this change doesn't make the warnings on installation go away, as
gh> they actually come from ucf(1).

That sounds terrible. OK, I hereby tell them.