It was reported in issue #6267 that the private key was leaked when
using the DEPLOY_HAPROXY_HOT_UPDATE=yes feature.
Indeed, the debugging code which sends commands to HAProxy was using
_debug even when passing the private key.
This patch fixes the issue by using _secure_debug when doing that.
By default acme.sh uses the '*' character in the filename for wildcard.
That can be confusing within HAProxy since the * character in front of a
filename in the stat socket is used to specified an uncommitted
transaction.
This patch replace the '*' by a '_' in the filename.
This is only done when using the default filename, the name can still be
forced with an asterisk.
DEPLOY_HAPROXY_MASTER_CLI allows to use the HAProxy master CLI instead
of a stats socket for DEPLOY_HAPROXY_HOT_UPDATE="yes"
The syntax of the master CLI is slightly different, a prefix with the
process number need to be added before any command.
This patch uses ${_cmdpfx} in front of every socat commands which is
filled when the master CLI is used.
William Lallemand