Always report the ws id in lowercase

bin/varnishd/cache/cache_http.c

@@ -102,6 +102,7 @@ http_fail(const struct http *hp)
 {
 
 	VSC_C_main->losthdr++;
+	hp->ws->id[0] |= 0x20;		// cheesy tolower()
 	VSLb(hp->vsl, SLT_Error, "out of workspace (%s)", hp->ws->id);
 	WS_MarkOverflow(hp->ws);
 }

bin/varnishtest/tests/r01739.vtc

@@ -17,7 +17,7 @@ varnish v1 -vcl+backend {
 
 logexpect l1 -v v1 -g raw {
 	expect * 1002 FetchError {^Workspace overflow}
-	expect * =    Error      {^out of workspace [(]Bo[)]}
+	expect * =    Error      {^out of workspace [(]bo[)]}
 } -start
 
 client c1 {

bin/varnishtest/tests/r01990.vtc

@@ -26,9 +26,9 @@ logexpect l1 -v v1 -g raw {
 	expect * 1002 FetchError   {^out of workspace}
 	expect * =    BerespStatus {^503}
 	expect * =    BerespReason {^Backend fetch failed}
-	expect * =    Error        {^out of workspace [(]Bo[)]}
+	expect * =    Error        {^out of workspace [(]bo[)]}
 	expect * =    LostHeader   {^Date:}
-	expect * =    Error        {^out of workspace [(]Bo[)]}
+	expect * =    Error        {^out of workspace [(]bo[)]}
 	expect * =    LostHeader   {^299}
 } -start