Merge branch '6763-link-to-nginx-wiki-doesn-t-exist' into 'develop'

Resolve "Link to nginx wiki doesn't exist"

Closes #6763

See merge request ispconfig/ispconfig3!1991

Author: Till Brehm

interface/web/sites/templates/web_vhost_domain_redirect.htm

@@ -30,7 +30,7 @@
 			<div class="form-group nginx">
                 <label for="rewrite_rules" class="col-sm-3 control-label">{tmpl_var name='rewrite_rules_txt'}</label>
                 <div class="col-sm-9"><textarea class="form-control" name="rewrite_rules" id="rewrite_rules" rows='10' cols='50'>{tmpl_var name='rewrite_rules'}</textarea>
-				<b>{tmpl_var name="allowed_rewrite_rule_directives_txt"}</b>&nbsp;break&nbsp;if&nbsp;return&nbsp;rewrite&nbsp;set<br />&nbsp;<a href="http://wiki.nginx.org/HttpRewriteModule" target="_blank">http://wiki.nginx.org/HttpRewriteModule</a></div>
+                    <b>{tmpl_var name="allowed_rewrite_rule_directives_txt"}</b>&nbsp;break&nbsp;if&nbsp;return&nbsp;rewrite&nbsp;set<br />&nbsp;<a href="https://nginx.org/docs/http/ngx_http_rewrite_module.html" target="_blank">https://nginx.org/docs/http/ngx_http_rewrite_module.html</a></div>
             </div>
 			<tmpl_if name="is_ssl_enabled" op="==" value="y">
 			<div class="form-group">