delete 'HOOK_CHAIN = yes' configuration.

If HOOK_CHAIN is enabled, deploy_challenge function will be called with arguments like :
  domain1 token_id1 token1 domain2 token_id2 token2 ...
but it is not supported with zope-hook.sh.

README.md

@@ -27,8 +27,6 @@ You need to prepare "config" file like :
 WELLKNOWN="${BASEDIR}"
 # We use a special hook script for zope.
 HOOK="${BASEDIR}/zope-hook.sh"
-#This is needed to call hook
-HOOK_CHAIN=yes
 ```
 
 You also need "domains.txt" like :

config

@@ -4,5 +4,3 @@
 WELLKNOWN="${BASEDIR}"
 # We use a special hook script for zope.
 HOOK="${BASEDIR}/zope-hook.sh"
-#This is needed to call hook
-HOOK_CHAIN=yes