Add code to use libusb-1.0 asynchronous transfers to fix problem of

occasional missed keys and eliminate use of key_timeout which disrupts the
main loop timing (by M. Jones).

LCDd.conf

@@ -926,6 +926,9 @@ Reboot=no
 ## Mini-box.com picoLCD (usblcd) driver ##
 [picolcd]
 
+# KeyTimeout is only used if the picoLCD driver is built with libusb-0.1. When
+# built with libusb-1.0 key and IR data is input asynchronously so there is no
+# need to wait for the USB data.
 # KeyTimeout is the time in ms that LCDd spends waiting for a key press before
 # cycling through other duties.  Higher values make LCDd use less CPU time and
 # make key presses more detectable.  Lower values make LCDd more responsive
@@ -933,6 +936,18 @@ Reboot=no
 # and a balanced value. [default: 500; legal: 0 - 1000]
 KeyTimeout=500
 
+# Key auto repeat is only available if the picoLCD driver is built with
+# libusb-1.0. Use KeyRepeatDelay and KeyRepeatInterval to configure key auto
+# repeat.
+#
+# Key auto repeat delay (time in ms from first key report to first repeat). Use
+# zero to disable auto repeat. [default: 300; legal: 0 - 3000]
+KeyRepeatDelay=300
+
+# Key auto repeat interval (time in ms between repeat reports). Only used if
+# KeyRepeatDelay is not zero. [default: 200; legal: 0 - 3000]
+KeyRepeatInterval=200
+
 # Sets the initial state of the backlight upon start-up.
 # [default: on; legal: on, off]
 #Backlight=on
@@ -948,6 +963,9 @@ Brightness=1000
 # Set the initial contrast [default: 1000; legal: 0 - 1000]
 Contrast=1000
 
+# Link the key lights to the backlight? [default: on; legal: on, off]
+#LinkLights=off
+
 # Light the keys? [default: on; legal: on, off]
 Keylights=on