Bug#972950: [regression] cal does not highlight current day

notfound 972950 11.1.2+b1

Bug#972950: [regression] cal does not highlight current day

Dear Maintainer, I have also been harmed by this regression in 'ncal' binary. This feature was removed in #904839 due to compatibility concerns. All systems I used in the last 5 years highlighted the current day, so I believe those compatibility concerns are very questionable. Also #833226, #86