project/name.md: expand on the name casing

project/name.md

@@ -20,6 +20,13 @@ were that clever…
 There are and were other projects using the name curl in various ways, but we
 were not aware of them by the time our curl came to be.
 
+## Uppercase or lowercase
+
+The project can be spelled with mixed case like `cURL`, even if we also often
+just write it in all lowercase: `curl`. You are free to use the version you
+like.. We tend to write about the command line tool and the library with all
+lowercacse: curl and libcurl.
+
 ## Pronunciation
 
 Most of us pronounce curl with an initial k sound, just like the English word