Re-worded SMTP Relay upgrade failure message.

Author: cmstew

install/upgrade/versions/1.4.0.sh

@@ -58,13 +58,15 @@ if [ "$MAIL_SYSTEM" == "exim4" ]; then
         echo '[ * ] Enabling SMTP relay support...'
         if grep -q "driver = plaintext" /etc/exim4/exim4.conf.template; then
             disable_smtp_relay=true
-            echo '[ ! ] ERROR: Manual intervention required to enable SMTP Relay:'
+            echo '[ ! ] ERROR: SMTP Relay upgrade failed:'
             echo ''
-            echo '      Exim only supports one plaintext authenticator.'
-            echo '      If you want to use the Hestia smtp relay feature,'
-            echo '      please review the /etc/exim4/exim4.conf.template'
-            echo '      file and resolve any conflicts.'
-            $HESTIA/bin/v-add-user-notification admin 'Manual intervention required to enable SMTP Relay' 'ERROR: Manual intervention required to enable SMTP Relay: <br />Exim only supports one plaintext authenticator. If you want to use the Hestia smtp relay feature, please review the /etc/exim4/exim4.conf.template file and resolve any conflicts.'
+            echo 'Because of the complexity of the SMTP Relay upgrade,'
+            echo 'we were unable to safely modify your existing exim config file.'
+            echo 'If you would like to use the new SMTP Relay features,'
+            echo 'you will have to replace or modify your config with the one found'
+            echo 'on GitHub at https://github.com/hestiacp/hestiacp/blob/release/install/deb/exim/exim4.conf.template.'
+            echo 'Your exim config file will be found here: /etc/exim4/exim4.conf.template'
+            $HESTIA/bin/v-add-user-notification admin 'SMTP Relay upgrade failed' 'Because of the complexity of the SMTP Relay upgrade, we were unable to safely modify your existing exim config file.<br><br>If you would like to use the new SMTP Relay features, you will have to replace or modify your config with the one found on <a href="https://github.com/hestiacp/hestiacp/blob/release/install/deb/exim/exim4.conf.template" target="_new"><i class="fab fa-github"></i> GitHub</a>.<br><br>Your exim config file will be found here:<br><br><code>/etc/exim4/exim4.conf.template</code>'
         else
             disable_smtp_relay=false
         fi