commit: docs

README.md

@@ -139,4 +139,22 @@ cd secrets.d
 
 Do this as many times as you wish/need.
 
-Alternately get a tool like `scallion` or `shallot` and use that to "mine" a desirable onion address. Be sure to store the private key in `secrets.d` with a filename like `xxxxxxxxxxxxxxxx.key` where `xxxxxxxxxxxxxxxx` is the corresponding onion address.
+Alternately get a tool like `scallion` or `shallot` and use that to
+"mine" a desirable onion address. Be sure to store the private key in
+`secrets.d` with a filename like `xxxxxxxxxxxxxxxx.key` where
+`xxxxxxxxxxxxxxxx` is the corresponding onion address.
+
+## But I not only have `www.foo.com`, I have www.dev.foo.com!
+
+Subdomains are supported thusly:
+
+```
+set project myproject
+hardmap secrets.d/xxxxxxxxxxxxxxxx.key foo.com dev
+```
+
+...and if you have multiple subdomains:
+
+```
+hardmap secrets.d/xxxxxxxxxxxxxxxx.key foo.com dev blogs dev.blogs [...]
+```