RT3802: Fixes typos in doc/crypto/

Signed-off-by: Rich Salz <rsalz@akamai.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>

doc/crypto/BIO_s_bio.pod

diff --git a/doc/crypto/BIO_s_bio.pod b/doc/crypto/BIO_s_bio.pod
index 8d0a55a..0f15990 100644
--- a/doc/crypto/BIO_s_bio.pod
+++ b/doc/crypto/BIO_s_bio.pod
@@ -162,7 +162,7 @@
 flush the write buffer and/or fill the read buffer.
 
 Use the BIO_ctrl_pending(), to find out whether data is buffered in the BIO
-and must be transfered to the network. Use BIO_ctrl_get_read_request() to
+and must be transferred to the network. Use BIO_ctrl_get_read_request() to
 find out, how many bytes must be written into the buffer before the
 SSL_operation() can successfully be continued.