use Script (Python) to support token starts with "_" character.

README.md

 This is a hook script of [dehydrated](https://github.com/lukas2511/dehydrated) (former name was letsencrypt.sh) for Zope backends.
 
-First, you need to prepare the target Zope folder beforehand so that URL like http://example.com/.well-known/acme-challenge/xxx works.
-For example, you can create the target folder in "portal_skins/custom/.well-known/acme-challenge".
+First, you need to prepare the target Zope folder beforehand so that URL like http://example.com/.well-known/xxx works.
+For example, you can create the target folder in "portal_skins/custom/.well-known".
 
 Next, you need to provide Zope's username and password in ~/.netrc like :
 

zope-hook.sh

@@ -11,17 +11,13 @@ case "${operation}" in
             domain="${1}"; shift
             token_id="${1}"; shift
             token="${1}"; shift
-            statuscode="$(curl -s -k -n -L -o /dev/null -w "%{http_code}" "https://${domain}/.well-known/acme-challenge/manage_addFile?id=${token_id}")"
+            statuscode="$(curl -s -k -n -L -o /dev/null -w "%{http_code}" "https://${domain}/.well-known/manage_delObjects?ids:list=acme-challenge")"
             if [[ ! "${statuscode:0:1}" = "2" ]]; then
-                statuscode="$(curl -s -n -L -o /dev/null -w "%{http_code}" "http://${domain}/.well-known/acme-challenge/manage_addFile?id=${token_id}")"
-                if [[ ! "${statuscode:0:1}" = "2" ]]; then
-                    echo 'Failed'
-                    exit 1
-                fi
+                statuscode="$(curl -s -n -L -o /dev/null -w "%{http_code}" "http://${domain}/.well-known/manage_delObjects?ids:list=acme-challenge")"
             fi
-            statuscode="$(curl -s -k -n -L -o /dev/null -w "%{http_code}" "https://${domain}/.well-known/acme-challenge/${token_id}/manage_edit?title=&content_type=text/plain&filedata=${token}")"
+            statuscode="$(curl -s -k -n -L -o /dev/null -w "%{http_code}" "https://${domain}/.well-known/manage_addProduct/PythonScripts/manage_addPythonScript?id=acme-challenge&file=return%20%27${token}%27")"
             if [[ ! "${statuscode:0:1}" = "2" ]]; then
-                statuscode="$(curl -s -n -L -o /dev/null -w "%{http_code}" "http://${domain}/.well-known/acme-challenge/${token_id}/manage_edit?title=&content_type=text/plain&filedata=${token}")"
+                statuscode="$(curl -s -n -L -o /dev/null -w "%{http_code}" "http://${domain}/.well-known/manage_addProduct/PythonScripts/manage_addPythonScript?id=acme-challenge&file=return%20%27${token}%27")"
                 if [[ ! "${statuscode:0:1}" = "2" ]]; then
                     echo 'Failed'
                     exit 1
@@ -34,9 +30,9 @@ case "${operation}" in
             domain="${1}"; shift
             token_id="${1}"; shift
             token="${1}"; shift
-            statuscode="$(curl -s -k -n -L -o /dev/null -w "%{http_code}" "https://${domain}/.well-known/acme-challenge/manage_delObjects?ids:list=${token_id}")"
+            statuscode="$(curl -s -k -n -L -o /dev/null -w "%{http_code}" "https://${domain}/.well-known/manage_delObjects?ids:list=acme-challenge")"
             if [[ ! "${statuscode:0:1}" = "2" ]]; then
-                statuscode="$(curl -s -n -L -o /dev/null -w "%{http_code}" "http://${domain}/.well-known/acme-challenge/manage_delObjects?ids:list=${token_id}")"
+                statuscode="$(curl -s -n -L -o /dev/null -w "%{http_code}" "http://${domain}/.well-known/manage_delObjects?ids:list=acme-challenge")"
                 if [[ ! "${statuscode:0:1}" = "2" ]]; then
                     echo 'Failed'
                     exit 1