CLEANUP: tree-wide: remove a few rare non-ASCII chars

As reported by Tim in issue #1428, our sources are clean, there are
just a few files with a few rare non-ASCII chars for the paragraph
symbol, a few typos, or in Fred's name. Given that Fred already uses
the non-accentuated form at other places like on the public list,
let's uniformize all this and make sure the code displays equally
everywhere.
diff --git a/src/quic_cc.c b/src/quic_cc.c
index f716877..a84cad0 100644
--- a/src/quic_cc.c
+++ b/src/quic_cc.c
@@ -3,7 +3,7 @@
  *
  * This file contains definitions for QUIC congestion control.
  *
- * Copyright 2019 HAProxy Technologies, Frédéric Lécaille <flecaille@haproxy.com>
+ * Copyright 2019 HAProxy Technologies, Frederic Lecaille <flecaille@haproxy.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public