Change spelling back to "behaviour" and "flavour" instead of the
American variants.

doc/ssl/SSL_write.pod

diff --git a/doc/ssl/SSL_write.pod b/doc/ssl/SSL_write.pod
index 4db8547..b086258 100644
--- a/doc/ssl/SSL_write.pod
+++ b/doc/ssl/SSL_write.pod
@@ -16,7 +16,7 @@
 B<ssl>. If necessary, SSL_write() will negotiate a TLS/SSL session, if
 not already explicitly performed by SSL_connect() or SSL_accept(). If the
 peer requests a re-negotiation, it will be performed transparently during
-the SSL_write() operation. The behavior of SSL_write() depends on the
+the SSL_write() operation. The behaviour of SSL_write() depends on the
 underlying BIO. 
 
 If the underlying BIO is B<blocking>, SSL_write() will only return, once the