Since 1.0pre3, we use OpenSSL for all cryptographic functions. So you need to
install this library first; grab it from http://www.openssl.org/. You will
need version 1.0.1 or later with support for AES256 and SHA256 enabled. If
-this library is not installed on you system, configure will fail. The manual
+this library is not installed on your system, configure will fail. The manual
in doc/tinc.texi contains more detailed information on how to install this
library. Alternatively, you may also use LibreSSL.