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.

1 files changed, 3 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index ce1f833..99a4cde 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,9 @@
 # all.
 TESTS=
 
+# host to bind to during regress
+REGRESS_HOST =	localhost
+
 # -- build-related variables --
 
 COBJS =		${COMPATS:.c=.o}