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/xprt_quic.c b/src/xprt_quic.c
index 34c4811..80950b6 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -1,7 +1,7 @@
 /*
  * QUIC transport layer over SOCK_DGRAM sockets.
  *
- * Copyright 2020 HAProxy Technologies, Frédéric Lécaille <flecaille@haproxy.com>
+ * Copyright 2020 HAProxy Technologies, Frederic Lecaille <flecaille@haproxy.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License