REGTESTS: Fix required versions for several scripts

The following scripts require HAProxy 2.4 :

 * cache/caching_rules.vtc
 * cache/post_on_entry.vtc
 * cache/vary.vtc
 * checks/1be_40srv_odd_health_checks.vtc
 * checks/40be_2srv_odd_health_checks.vtc
 * checks/4be_1srv_health_checks.vtc
 * converter/fix.vtc
 * converter/mqtt.vtc
 * http-messaging/protocol_upgrade.vtc
 * http-messaging/websocket.vtc
 * http-set-timeout/set_timeout.vtc
 * log/log_uri.vtc

However it may change is features are backported.

reg-tests/cache/caching_rules.vtc

@@ -2,7 +2,7 @@ varnishtest "Caching rules test"
 # A response will not be cached unless it has an explicit age (Cache-Control max-age of s-maxage, Expires) or a validator (Last-Modified, or ETag)
 # A response will not be cached either if it has an Age header that is either invalid (should be an integer) or greater than its max age.
 
-#REQUIRE_VERSION=1.9
+#REQUIRE_VERSION=2.4
 
 feature ignore_unknown_macro
 

reg-tests/cache/post_on_entry.vtc

@@ -1,6 +1,6 @@
 varnishtest "A successful unsafe method (POST for instance) on a cached entry must disable it."
 
-#REQUIRE_VERSION=2.3
+#REQUIRE_VERSION=2.4
 
 feature ignore_unknown_macro
 

reg-tests/cache/vary.vtc

@@ -1,6 +1,6 @@
 varnishtest "Vary support"
 
-#REQUIRE_VERSION=2.3
+#REQUIRE_VERSION=2.4
 
 feature ignore_unknown_macro
 

reg-tests/checks/1be_40srv_odd_health_checks.vtc

@@ -6,7 +6,7 @@ feature ignore_unknown_macro
 # The first health-checks passed tests are checked for all these servers
 # thanks to syslog messages.
 
-#REQUIRE_VERSION=1.8
+#REQUIRE_VERSION=2.4
 #EXCLUDE_TARGETS=freebsd
 #REGTEST_TYPE=slow
 

reg-tests/checks/40be_2srv_odd_health_checks.vtc

@@ -1,7 +1,7 @@
 varnishtest "Health-checks"
 feature ignore_unknown_macro
 
-#REQUIRE_VERSION=1.8
+#REQUIRE_VERSION=2.4
 #EXCLUDE_TARGETS=freebsd,osx,generic
 #REGTEST_TYPE=slow
 

reg-tests/checks/4be_1srv_health_checks.vtc

@@ -1,7 +1,7 @@
 varnishtest "Health-check test"
 feature ignore_unknown_macro
 
-#REQUIRE_VERSION=1.8
+#REQUIRE_VERSION=2.4
 #EXCLUDE_TARGETS=freebsd
 #REGTEST_TYPE=slow
 

reg-tests/converter/fix.vtc

@@ -1,5 +1,5 @@
 varnishtest "fix converters Test"
-#REQUIRE_VERSION=2.3
+#REQUIRE_VERSION=2.4
 
 feature ignore_unknown_macro
 

reg-tests/converter/mqtt.vtc

@@ -1,5 +1,5 @@
 varnishtest "mqtt converters Test"
-#REQUIRE_VERSION=2.3
+#REQUIRE_VERSION=2.4
 
 feature ignore_unknown_macro
 

reg-tests/http-messaging/protocol_upgrade.vtc

@@ -8,6 +8,8 @@ varnishtest "h1/h2 support for protocol upgrade test"
 
 feature ignore_unknown_macro
 
+#REQUIRE_VERSION=2.4
+
 # http/1.1 server
 server srv_h1 {
 	rxreq

reg-tests/http-messaging/websocket.vtc

@@ -12,6 +12,8 @@ varnishtest "WebSocket test"
 
 feature ignore_unknown_macro
 
+#REQUIRE_VERSION=2.4
+
 # valid websocket server
 server s1 {
 	rxreq

reg-tests/http-set-timeout/set_timeout.vtc

@@ -2,6 +2,8 @@ varnishtest "http-request set-timeout test"
 
 feature ignore_unknown_macro
 
+#REQUIRE_VERSION=2.4
+
 server srv_h1 -repeat 3 {
     rxreq
     txresp

reg-tests/log/log_uri.vtc

@@ -1,6 +1,8 @@
 varnishtest "Verify logging of relative/absolute URI path"
 feature ignore_unknown_macro
 
+#REQUIRE_VERSION=2.4
+
 server s1 {
     rxreq
     txresp