REGTESTS: use -dW by default on every reg-tests

Every reg-test now runs without any warning, so let's acivate -dW by
default so the new ones will inheritate the option.

This patch reverts 9d511b3 ("REGTESTS: enable -dW on almost all tests
to fail on warnings") and adds -dW in the default HAPROXY_ARGS of
scripts/run-regtests.sh instead.

Author: wlallemand

reg-tests/balance/balance-rr.vtc

@@ -21,7 +21,7 @@ server s4 {
     txresp -hdr "Server: s4"
 } -repeat 2 -start
 
-haproxy h1 -arg "-L A" -arg '-dW' -conf {
+haproxy h1 -arg "-L A" -conf {
     defaults
         mode http
         timeout server "${HAPROXY_TEST_TIMEOUT-5s}"

reg-tests/balance/balance-uri-path-only.vtc

@@ -22,7 +22,7 @@ server s4 {
     txresp -hdr "Server: s4" -body "s4"
 } -repeat 5 -start
 
-haproxy h1 -arg "-L A" -arg '-dW' -conf {
+haproxy h1 -arg "-L A" -conf {
     defaults
         mode http
         timeout server "${HAPROXY_TEST_TIMEOUT-5s}"

reg-tests/balance/balance-uri.vtc

@@ -21,7 +21,7 @@ server s4 {
     txresp -hdr "Server: s4"
 } -repeat 2 -start
 
-haproxy h1 -arg "-L A" -arg '-dW' -conf {
+haproxy h1 -arg "-L A" -conf {
     defaults
         mode http
         timeout server "${HAPROXY_TEST_TIMEOUT-5s}"

reg-tests/cache/basic.vtc

@@ -22,7 +22,7 @@ server s1 {
     chunkedlen 0
 } -start
 
-haproxy h1 -arg '-dW' -conf {
+haproxy h1 -conf {
     defaults
         mode http
         timeout connect "${HAPROXY_TEST_TIMEOUT-5s}"

reg-tests/cache/caching_rules.vtc

@@ -113,7 +113,7 @@ server s2 {
         -bodylen 170
 } -start
 
-haproxy h1 -arg '-dW' -conf {
+haproxy h1 -conf {
     global
         # WT: limit false-positives causing "HTTP header incomplete" due to
         # idle server connections being randomly used and randomly expiring

reg-tests/cache/expires.vtc

@@ -39,7 +39,7 @@ server s3 {
        chunkedlen 0
 } -start
 
-haproxy h1 -arg '-dW' -conf {
+haproxy h1 -conf {
        global
                # WT: limit false-positives causing "HTTP header incomplete" due to
                # idle server connections being randomly used and randomly expiring

reg-tests/cache/if-modified-since.vtc

@@ -39,7 +39,7 @@ server s1 {
        chunkedlen 0
 } -start
 
-haproxy h1 -arg '-dW' -conf {
+haproxy h1 -conf {
        global
                # WT: limit false-positives causing "HTTP header incomplete" due to
                # idle server connections being randomly used and randomly expiring

reg-tests/cache/if-none-match.vtc

@@ -24,7 +24,7 @@ server s1 {
        chunkedlen 0
 } -start
 
-haproxy h1 -arg '-dW' -conf {
+haproxy h1 -conf {
        global
                # WT: limit false-positives causing "HTTP header incomplete" due to
                # idle server connections being randomly used and randomly expiring

reg-tests/cache/post_on_entry.vtc

@@ -22,7 +22,7 @@ server s1 {
 
 } -start
 
-haproxy h1 -arg '-dW' -conf {
+haproxy h1 -conf {
        defaults
                mode http
                timeout connect "${HAPROXY_TEST_TIMEOUT-5s}"

reg-tests/cache/sample_fetches.vtc

@@ -41,7 +41,7 @@ server s3 {
        chunkedlen 0
 } -start
 
-haproxy h1 -arg '-dW' -conf {
+haproxy h1 -conf {
     global
         # WT: limit false-positives causing "HTTP header incomplete" due to
         # idle server connections being randomly used and randomly expiring