Update README.md

Author: eidheim

README.md

@@ -41,7 +41,7 @@ Finally, direct your favorite browser to for instance http://localhost:8080/
 
 g++ -O3 -std=c++11 -lboost_system -lssl -lcrypto main_https.cpp -o https_server
 
-Before running the server, an RSA private key (server.key) and a (self-signed) certificate (server.crt) must be created. Follow, for instance, the instructions given here: http://www.akadia.com/services/ssh_test_certificate.html
+Before running the server, an RSA private key (server.key) and an SSL certificate (server.crt) must be created. Follow, for instance, the instructions given here (for a self-signed certificate): http://www.akadia.com/services/ssh_test_certificate.html
 
 Then to run the server: ./https_server