use REGRESS_HOST to specify the host to listen to; use in CI

some CI envs don't like `listen on localhost' but tolerate INADDR_ANY
or IN6ADDR_ANY_INIT.

.cirrus.yml

@@ -5,7 +5,7 @@ linux_amd64_task:
     - apk add alpine-sdk linux-headers bison libretls-dev libevent-dev
     - ./configure CFLAGS='-O2 -pipe -Wno-deprecated-declarations' -Werror
     - make
-    - make regress
+    - make regress REGRESS_HOST="*"
 
 linux_arm_task:
   arm_container:
@@ -14,7 +14,7 @@ linux_arm_task:
     - apk add alpine-sdk linux-headers bison libretls-dev libevent-dev
     - ./configure CFLAGS='-O2 -pipe -Wno-deprecated-declarations' -Werror
     - make
-    - make regress
+    - make regress REGRESS_HOST="*"
 
 freebsd_13_task:
   freebsd_instance:

Makefile

@@ -18,6 +18,9 @@
 # all.
 TESTS=
 
+# host to bind to during regress
+REGRESS_HOST =	localhost
+
 # -- build-related variables --
 
 COBJS =		${COMPATS:.c=.o}

regress/Makefile

@@ -2,6 +2,9 @@
 # all.
 TESTS=
 
+# host to bind to during regress
+REGRESS_HOST =	localhost
+
 DISTFILES =	Makefile \
 		env \
 		err \
@@ -34,7 +37,7 @@ IRI_OBJS =	${IRI_SRCS:.c=.o} ${REG_COMPATS}
 .PHONY: all data clean dist
 
 all: data puny-test iri_test fcgi-test
-	./regress ${TESTS}
+	env REGRESS_HOST="${REGRESS_HOST}" ./regress ${TESTS}
 
 data: testdata cert.pem testca.pem valid.crt invalid.cert.pem
 

regress/lib.sh

@@ -62,7 +62,7 @@ server "localhost" {
 	cert "$PWD/cert.pem"
 	key  "$PWD/key.pem"
 	root "$PWD/testdata"
-	listen on localhost port $port
+	listen on $REGRESS_HOST port $port
 	$2
 }
 EOF
@@ -77,7 +77,7 @@ set_proxy() {
 server "localhost.local" {
 	cert "$PWD/cert.pem"
 	key "$PWD/key.pem"
-	listen on localhost port $port
+	listen on $REGRESS_HOST port $port
 	proxy {
 		relay-to localhost port $port
 		$1

regress/tests.sh

@@ -245,7 +245,7 @@ server "localhost" {
 	cert \$pwd "/cert.pem"
 	key  \$pwd "/key.pem"
 	root \$pwd "/testdata"
-	listen on localhost port $port
+	listen on $REGRESS_HOST port $port
 }
 EOF