repo/settings: add description and link to personal SSH keys (#3936)

conf/locale/locale_en-US.ini

@@ -767,6 +767,7 @@ settings.slack_token = Token
 settings.slack_domain = Domain
 settings.slack_channel = Channel
 settings.deploy_keys = Deploy Keys
+settings.deploy_keys_helper = <b>Common Gotcha!</b> If you're looking for adding personal public keys, please add them in your <a href="%s%s">account settings</a>.
 settings.add_deploy_key = Add Deploy Key
 settings.deploy_key_desc = Deploy keys have read-only access. They are not the same as personal account SSH keys.
 settings.no_deploy_keys = You haven't added any deploy keys.

templates/repo/settings/deploy_keys.tmpl

@@ -45,6 +45,7 @@
 					{{end}}
 				</div>
 				<br>
+				<p>{{.i18n.Tr "repo.settings.deploy_keys_helper" AppSubUrl "/user/settings/ssh" | Safe}}</p>
 				<div {{if not .HasError}}class="hide"{{end}} id="add-deploy-key-panel">
 					<h4 class="ui top attached header">
 						{{.i18n.Tr "repo.settings.add_deploy_key"}}