add trurl / libcurl compatibilty to readme. link to URL quirks

Closes #320

README.md

@@ -162,3 +162,20 @@ if someone wanted to.
 
 trurl builds with libcurl older than 7.81.0 but will then not work as
 good. For all the documented goodness, use a more modern libcurl.
+
+### trurl / libcurl Compatibility
+
+| trurl Feature   |  Minimum libcurl Version |
+|-----------------|--------------------------|
+| imap-options    |   7.30.0                 |
+| normalize-ipv   |   7.77.0                 | 
+| white-space     |   7.78.0                 |
+| url-strerror    |   7.80.0                 |
+| zone-id         |   7.81.0                 |
+| punycode        |   7.88.0                 |
+| punycode2idn    |   8.3.0                  |
+| no-guess-scheme |   8.9.0                  |
+
+For more details on how trurl will behave if these features are missing see [URL Quirks](https://github.com/curl/trurl/blob/master/URL-QUIRKS.md).
+To see the features your version of trurl supports as well as the version of libcurl it is built with, run the following command:  `trurl --version`
+

URL-QUIRKS.md

@@ -1,6 +1,6 @@
 # URL Quirks
 
-This is a collection peculiarities to may find in trurl due to bugs or
+This is a collection of peculiarities you may find in trurl due to bugs or
 changes/improvements in libcurl's URL handling.
 
 ## The URL API