Moved package files to contrib/

Added FreeBSD PAM config
diff --git a/contrib/sshd.pam.generic b/contrib/sshd.pam.generic
new file mode 100644
index 0000000..cf5af30
--- /dev/null
+++ b/contrib/sshd.pam.generic
@@ -0,0 +1,8 @@
+#%PAM-1.0
+auth       required     /lib/security/pam_unix.so shadow nodelay
+auth       required     /lib/security/pam_nologin.so
+account    required     /lib/security/pam_unix.so
+password   required     /lib/security/pam_cracklib.so
+password   required     /lib/security/pam_unix.so shadow nullok use_authtok
+session    required     /lib/security/pam_unix.so
+session    required     /lib/security/pam_limits.so