ossl.4: Canonicalize SYNOPSIS + tag SPDX

MFC after:	3 days

share/man/man4/ossl.4

@@ -1,3 +1,6 @@
+.\"
+.\" SPDX-License-Identifier: BSD-2-Clause
+.\"
 .\" Copyright (c) 2020 Netflix, Inc
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -31,21 +34,13 @@
 .Nm ossl
 .Nd "driver using OpenSSL assembly routines"
 .Sh SYNOPSIS
-To compile this driver into the kernel,
-place the following lines in your
-kernel configuration file:
-.Bd -ragged -offset indent
-.Cd "device crypto"
-.Cd "device cryptodev"
-.Cd "device ossl"
-.Ed
+.Cd device crypto
+.Cd device cryptodev
+.Cd device ossl
 .Pp
-Alternatively, to load the driver as a
-module at boot time, place the following line in
+In
 .Xr loader.conf 5 :
-.Bd -literal -offset indent
-ossl_load="YES"
-.Ed
+.Cd ossl_load="YES"
 .Sh DESCRIPTION
 The OpenSSL distribution includes architecture-specific
 implementations for some commonly used cryptographic algorithms.