Include DCO status in GLOBAL_STATS status v2 output

Include DCO status in GLOBAL_STATS status v2 output

This is allows querying the DCO status from management interface or by
sending SIGUSR2 without doing an error-prone parsing of the startup log.

Also remove comment that serves no purpose anymore.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Lev Stipakov <lstipakov@gmail.com>
Message-Id: <20220813211104.411554-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg24923.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>