There are a couple of cases of GNU extensions being used in
clamav-unofficial-sigs.sh; all being \s, or [[:space:]]. Patch
these over to [[:space:]] since this script is already otherwise
patched until our base sed becomes GNU-compatible in this respect.
This worked up until this point because \s is being interpreted as
an escaped 's', which is an ordinary character. Future versions
of regex(3) will disallowed escaped ordinary characters, so this
will become an error if left unpatched.
PR: 233461
Submitted by: kevans, Marko Njezic <sf@maxempire.com> (maintainer, final patch)
fed3d4266c