add `--nocron`, for not installing default cronjob.

acme.sh

@@ -2156,12 +2156,16 @@ _initconf() {
   fi
 }
 
+# nocron
 _precheck() {
+  _nocron="$1"
+  
   if ! _exists "curl"  && ! _exists "wget"; then
     _err "Please install curl or wget first, we need to access http resources."
     return 1
   fi
   
+  if [ -z "$_nocron" ] ; then
     if ! _exists "crontab" ; then
       _err "It is recommended to install crontab first. try to install 'cron, crontab, crontabs or vixie-cron'."
       _err "We need to set cron job to renew the certs automatically."
@@ -2172,6 +2176,7 @@ _precheck() {
         return 1
       fi
     fi
+  fi
   
   if ! _exists "openssl" ; then
     _err "Please install openssl first."
@@ -2243,14 +2248,15 @@ _installalias() {
 
 }
 
+# nocron
 install() {
-
+  _nocron="$1"
   if ! _initpath ; then
     _err "Install failed."
     return 1
   fi
 
-  if ! _precheck ; then
+  if ! _precheck "$_nocron" ; then
     _err "Pre-check failed, can not install."
     return 1
   fi
@@ -2313,7 +2319,9 @@ install() {
     _saveaccountconf "ACCOUNT_KEY_PATH" "$ACCOUNT_KEY_PATH"
   fi
   
+  if [ -z "$_nocron" ] ; then
     installcronjob
+  fi
 
   if [ -z "$NO_DETECT_SH" ] ; then
     #Modify shebang
@@ -2429,8 +2437,9 @@ Parameters:
   --httpport                        Specifies the standalone listening port. Only valid if the server is behind a reverse proxy or load balancer.
   --tlsport                         Specifies the standalone tls listening port. Only valid if the server is behind a reverse proxy or load balancer.
   --listraw                         Only used for '--list' command, list the certs in raw format.
-  --stopRenewOnError, -se           Only valid for '--renewall' command. Stop to renew all if one cert has error in renewal.
+  --stopRenewOnError, -se           Only valid for '--renewall' command. Stop if one cert has error in renewal.
   --insecure                        Do not check the server certificate, in some devices, the api server's certificate may not be trusted.
+  --nocron                          Only valid for `--install` command, which means: do not install the default cron job. In this case, the certs will not be renewed automatically.
   "
 }
 
@@ -2485,6 +2494,7 @@ _process() {
   _listraw=""
   _stopRenewOnError=""
   _insecure=""
+  _nocron=""
   while [ ${#} -gt 0 ] ; do
     case "${1}" in
     
@@ -2722,6 +2732,9 @@ _process() {
         _insecure="1"
         Le_Insecure="$_insecure"
         ;;
+    --nocron)
+        _nocron="1"
+        ;;
     *)
         _err "Unknown parameter : $1"
         return 1
@@ -2733,7 +2746,7 @@ _process() {
 
 
   case "${_CMD}" in
-    install) install ;;
+    install) install "$_nocron" ;;
     uninstall) uninstall ;;
     issue)
       issue  "$_webroot"  "$_domain" "$_altdomains" "$_keylength" "$_certpath" "$_keypath" "$_capath" "$_reloadcmd" "$_fullchainpath"