Rename my license agreement

RELICENSE/benjaminderoche.md → RELICENSE/benjdero.md

@@ -4,7 +4,7 @@ This is a statement by Benjamin Deroche
 that grants permission to relicense its copyrights in the libzmq C++
 library (ZeroMQ) under the Mozilla Public License v2 (MPLv2).
 
-A portion of the commits made by the Github handle "BenjaminDeroche", with
+A portion of the commits made by the Github handle "benjdero", with
 commit author "Benjamin Deroche", are copyright of Benjamin Deroche.
 This document hereby grants the libzmq project team to relicense libzmq, 
 including all past, present and future contributions of the author listed above.