Imported Upstream version 2.7.3

docs/man/ups.conf.txt

@@ -80,6 +80,22 @@ delay which is controlled by this setting.  This is normally 2 seconds.  This
 may be useful if the driver is creating too much of a load on your system or
 network.
 
+*synchronous*::
+
+Optional.  The driver work by default in asynchronous mode (i.e
+*synchronous=no*).  This means that all data are pushed by the driver
+on the communication socket to upsd (Unix socket on Unix, Named pipe
+on Windows) without waiting for these data to be actually consumed.
+With some HW, such as ePDUs, that can produce a lot of data,
+asynchronous mode may cause some congestion, resulting in the socket to
+be full, and the driver to appear as not connected.  By enabling the
+'synchronous' flag (value = 'yes'), the driver will wait for data to be
+consumed by upsd, prior to publishing more.  This can be enabled either
+globally or per driver.
++
+The default is 'no' (i.e. asynchronous mode) for backward compatibility
+of the driver behavior.
+
 *user*::
 
 Optional.  If started as root, the driver will setuid(2) to the user id
@@ -154,6 +170,21 @@ system from getting stuck due to a broken driver or UPS.
 +
 The default is 45 seconds.
 
+*synchronous*::
+
+Optional.  Same as the global directive of the same name, but this is
+for a specific device.
+
+*usb_set_altinterface*[='altinterface']::
+
+Optional.  Force the USB code to call `usb_set_altinterface(0)`, as was done in
+NUT 2.7.2 and earlier.  This should not be necessary, since the default for
+`bAlternateSetting` (as shown in lsusb) is zero on all USB devices seen to
+date.  However, this redundant call to `usb_set_altinterface()` prevents
+certain UPSes from working on Mac OS X. If your UPS requires explicitly setting
+the alternate interface, include this flag, and email the nut-upsdev list with
+details about your UPS and operating system.
+
 *default.<variable>*::
 
 Optional.  Set a default value for <variable> which is used in case the UPS