[knot-dns-users] Knot 1.4.0-rc2 is case-sensitive!

I exposed Knot 1.4.0-rc2 to real queries, and noticed it was giving REFUSED responses for a significant number of queries. Digging further, it looks like the QNAMEs were mixed-case, such as: 42.234.11.86.In-adDR.ArPA So here's where I discovered a show-stopper bug: # dig +norec @193.0.9.5 ptr 42.234.11.86.in-addr.arpa ; <<>> DiG 9.9.4-P1 <<>> +norec @193.0.9.5 ptr 42.234.11.86.in-addr.arpa ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16021 ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;42.234.11.86.in-addr.arpa. IN PTR ;; AUTHORITY SECTION: 234.11.86.in-addr.arpa. 86400 IN NS ns1.virginmedia.net. 234.11.86.in-addr.arpa. 86400 IN NS ns2.virginmedia.net. 234.11.86.in-addr.arpa. 86400 IN NS ns3.virginmedia.net. 234.11.86.in-addr.arpa. 86400 IN NS ns4.virginmedia.net. # dig +norec @193.0.9.5 ptr 42.234.11.86.In-adDR.ArPA ; <<>> DiG 9.9.4-P1 <<>> +norec @193.0.9.5 ptr 42.234.11.86.In-adDR.ArPA ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 57269 ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;42.234.11.86.In-adDR.ArPA. IN PTR # dig +norec @193.0.9.5 ptr 42.234.11.86.IN-ADDR.ARPA ; <<>> DiG 9.9.4-P1 <<>> +norec @193.0.9.5 ptr 42.234.11.86.IN-ADDR.ARPA ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 18592 ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;42.234.11.86.IN-ADDR.ARPA. IN PTR