diff --git a/README.md b/README.md
index 46cfa25f..9df71430 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ turn almost any device into a file server with resumable uploads/downloads using
         * [audio equalizer](#audio-equalizer) - and [dynamic range compressor](https://en.wikipedia.org/wiki/Dynamic_range_compression)
         * [fix unreliable playback on android](#fix-unreliable-playback-on-android) - due to phone / app settings
     * [markdown viewer](#markdown-viewer) - and there are *two* editors
+        * [markdown vars](#markdown-vars) - dynamic docs with serverside variable expansion
     * [other tricks](#other-tricks)
     * [searching](#searching) - search by size, date, path/name, mp3-tags, ...
 * [server config](#server-config) - using arguments or config files, or a mix of both
@@ -239,6 +240,7 @@ also see [comparison to similar software](./docs/versus.md)
 * markdown
   * ☑ [viewer](#markdown-viewer)
   * ☑ editor (sure why not)
+  * ☑ [variables](#markdown-vars)
 
 PS: something missing? post any crazy ideas you've got as a [feature request](https://github.com/9001/copyparty/issues/new?assignees=9001&labels=enhancement&template=feature_request.md) or [discussion](https://github.com/9001/copyparty/discussions/new?category=ideas) 🤙
 
@@ -845,6 +847,13 @@ other notes,
 * the document preview has a max-width which is the same as an A4 paper when printed
 
 
+### markdown vars
+
+dynamic docs with serverside variable expansion  to replace stuff like `{{self.ip}}` with the client's IP, or `{{srv.htime}}` with the current time on the server
+
+see [./srv/expand/](./srv/expand/) for usage and examples
+
+
 ## other tricks
 
 * you can link a particular timestamp in an audio file by adding it to the URL, such as `&20` / `&20s` / `&1m20` / `&t=1:20` after the `.../#af-c8960dab`
diff --git a/copyparty/authsrv.py b/copyparty/authsrv.py
index e6b35a0c..a9947bc8 100644
--- a/copyparty/authsrv.py
+++ b/copyparty/authsrv.py
@@ -1783,7 +1783,7 @@ class AuthSrv(object):
 
             zs = str(vol.flags.get("tcolor", ""))
             if len(zs) == 3:  # fc5 => ffcc55
-                vol.flags["tcolor"] = "".join([x*2 for x in zs])
+                vol.flags["tcolor"] = "".join([x * 2 for x in zs])
 
             for k1, k2 in IMPLICATIONS:
                 if k1 in vol.flags:
@@ -2422,7 +2422,7 @@ def expand_config_file(
         if not cnames:
             t = "warning: tried to read config-files from folder '%s' but it does not contain any "
             if names:
-                t += ".conf files; the following files were ignored: %s"
+                t += ".conf files; the following files/subfolders were ignored: %s"
                 t = t % (fp, ", ".join(names[:8]))
             else:
                 t += "files at all"
diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index 246c5f7e..5c13c96a 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -4536,12 +4536,14 @@ class HttpCli(object):
                     margin = "DIR"
                 elif add_dk:
                     zs = absreal(fspath)
-                    margin = '<a href="%s?k=%s&zip" rel="nofollow">zip</a>' % (
+                    margin = '<a href="%s?k=%s&zip=crc" rel="nofollow">zip</a>' % (
                         quotep(href),
                         self.gen_fk(2, self.args.dk_salt, zs, 0, 0)[:add_dk],
                     )
                 else:
-                    margin = '<a href="%s?zip" rel="nofollow">zip</a>' % (quotep(href),)
+                    margin = '<a href="%s?zip=crc" rel="nofollow">zip</a>' % (
+                        quotep(href),
+                    )
             elif fn in hist:
                 margin = '<a href="%s.hist/%s">#%s</a>' % (
                     base,