Introduce proper renewer config via constants.py

letsencrypt/constants.py

@@ -1,4 +1,5 @@
 """Let's Encrypt constants."""
+import configobj
 import logging
 
 from acme import challenges
@@ -25,6 +26,18 @@ CLI_DEFAULTS = dict(
 """Defaults for CLI flags and `.IConfig` attributes."""
 
 
+RENEWER_DEFAULTS = configobj.ConfigObj(dict(
+    renewer_config_file="/etc/letsencrypt/renewer.conf",
+    renewal_configs_dir="/etc/letsencrypt/configs",
+    archive_dir="/etc/letsencrypt/archive",
+    live_dir="/etc/letsencrypt/live",
+    renewer_enabled="yes",
+    renew_before_expiry="30 days",
+    deploy_before_expiry="20 days",
+))
+"""Defaults for renewer script."""
+
+
 EXCLUSIVE_CHALLENGES = frozenset([frozenset([
     challenges.DVSNI, challenges.SimpleHTTPS])])
 """Mutually exclusive challenges."""