Compare query with case-insensitive compare

Required by TCP queries retrying query on REDHAT.COM VPN, which offers
too many SRV records to fit into reply without EDNS0. That means length
of answer >512 bytes, as used by kinit implementation.

dnsmasq-2.87-tcp-strcasecmp.patch

@@ -0,0 +1,33 @@
+From 6ad1f6f44e77619eeb1f9f16e205c24a1dc3e68b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
+Date: Thu, 14 Oct 2021 20:56:17 +0200
+Subject: [PATCH] Compare order case insensitive
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+DNS labels are defined case insensitive. When queried over TCP, query
+name is not put to lower case. Make it match even when domain differs
+only by used case.
+
+Signed-off-by: Petr Menšík <pemensik@redhat.com>
+---
+ src/domain-match.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/domain-match.c b/src/domain-match.c
+index e5b409e..3a69aa1 100644
+--- a/src/domain-match.c
++++ b/src/domain-match.c
+@@ -495,7 +495,7 @@ static int order(char *qdomain, size_t qlen, struct server *serv)
+   if (qlen > dlen)
+     return -1;
+ 
+-  return strcmp(qdomain, serv->domain);
++  return strcasecmp(qdomain, serv->domain);
+ }
+ 
+ static int order_servers(struct server *s1, struct server *s2)
+-- 
+2.31.1
+

dnsmasq.spec

@@ -62,6 +62,8 @@ Patch25:         dnsmasq-2.86-domain-match-local.patch
 # https://bugzilla.redhat.com/show_bug.cgi?id=2009975
 # replaces/enhances http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=d290630d31f4517ab26392d00753d1397f9a4114
 Patch26:         dnsmasq-2.86-build_server_array.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2014019
+Patch28:         dnsmasq-2.87-tcp-strcasecmp.patch
 
 
 
@@ -207,6 +209,7 @@ install -Dpm 644 %{SOURCE2} %{buildroot}%{_sysusersdir}/%{name}.conf
 %changelog
 * Thu Oct 14 2021 Petr Menšík <pemensik@redhat.com> - 2.86-3
 - Rebuild server_array on any server change (#2009975)
+- Compare case-insensitive also TCP queries (#2014019)
 
 * Thu Sep 23 2021 Petr Menšík <pemensik@redhat.com> - 2.86-2
 - Attempt to fix regression found on recent release (#2006367)