docs: help man to find entry for 'libmicrohttpd'

doc/libmicrohttpd.3

@@ -1,6 +1,6 @@
 .TH LIBMICROHTTPD "3" "21 Jun 2013 "libmicrohttpd"
 .SH "NAME"
-GNU libmicrohttpd \- library for embedding HTTP servers
+libmicrohttpd \- library for embedding HTTP servers
 .SH "SYNOPSIS"
 
  \fB#include <microhttpd.h>