mark the option better

docs/libcurl/curl_easy_setopt.3

@@ -56,7 +56,7 @@ The \fIhandle\fP is the return code from a \fIcurl_easy_init(3)\fP or
 Set the parameter to non-zero to get the library to display a lot of verbose
 information about its operations. Very useful for libcurl and/or protocol
 debugging and understanding. The verbose information will be sent to stderr,
-or the stream set with CURLOPT_STDERR.
+or the stream set with \fICURLOPT_STDERR\fP.
 
 You hardly ever want this set in production use, you will almost always want
 this when you debug/report problems. Another neat option for debugging is the