Version 5.5.1

- Introduced initial support for multiple Active Directory authentication sources with Duo Single Sign-On. - An invalid [cloud] section in authproxy.cfg no longer interferes with other valid [cloud] configuration sections. - Fixes an issue that caused the Authentication Proxy not to reconnect to Duo automatically for SSO and Directory Sync after a period of degraded network connectivity. - The Linux installer correctly expands tilde characters in the install path. - Mutes excessive tracebacks caused by rapidly opening and then closing incoming connections to ldap_server_auto configured with ad_client. - The Linux installation script creates the necessary SELinux configuration (if appropriate) to allow start of the Authentication Proxy with systemd.