Update man-page

This was done semi-automatically starting with
```
help2man -N -n "digital audio workstation" \
         --version-string=6 \
         -o ardour.1 gtk2_ardour/ardev
```

and then manually replacing "ardev" with "ardour" as well as
various upper-case and all-caps variants thereof.

ardour.1

@@ -1,75 +1,65 @@
-.TH ARDOUR 1 2002-12-29
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.8.
+.TH ARDOUR "1" "July 2020" "ardour 6" "User Commands"
 .SH NAME
-ardour \- a digital audio workstation
+Ardour \- digital audio workstation
 .SH SYNOPSIS
-ardour
+.B ardour
-.B \-b
+[ \fI\,OPTIONS \/\fR] [ \fI\,SESSION-NAME \/\fR]
-.RB [ \-U
-.IR file ]
-.RI [ session ]
-.br
-ardour
-.B \-\-help
 .SH DESCRIPTION
-Ardour is a multichannel hard disk recorder (HDR) and digital audio 
+Ardour is a multichannel hard disk recorder (HDR) and digital audio workstation (DAW).
-workstation (DAW).
-It is capable of simultaneous recording 24 or more channels of 32 bit audio at
-48kHz.
-Ardour is intended to function as a "professional" HDR system, replacing
-dedicated hardware solutions such as the Mackie HDR, the Tascam 2424 and more
-traditional tape systems like the Alesis ADAT series.
-It is also intended to provide the same or better functionality as software 
-systems such as ProTools, Samplitude, Logic Audio, Nuendo and Cubase VST (we 
-acknowledge these and all other names as trademarks of their respective 
-owners).
-It supports MIDI Machine Control, and so can be controlled from any MMC
-controller, such as the Mackie Digital 8 Bus mixer and many other modern
-digital mixers. 
 .SH OPTIONS
 .TP
-.B \-a
+\fB\-a\fR, \fB\-\-no\-announcements\fR
-do not contact ardour.org at program startup to check for announcements
+Do not contact website for announcements
 .TP
-.B \-b
+\fB\-A\fR, \fB\-\-actions\fR
-Print all possible keyboard binding names.
+Print all possible menu action names
 .TP
-.B \-U
+\fB\-b\fR, \fB\-\-bindings\fR
-Specify the path to the GTK RC file to use.
+Display all current key bindings
-The provided one is called
-.B ardour_ui.rc
-and lives in the top level Ardour source directory.
-This file controls all color and font use within Ardour.
-Ardour will run without it, but its appearance is, uhm, ugly.
 .TP
-.B \-\-help
+\fB\-B\fR, \fB\-\-bypass\-plugins\fR
-Displays the help message.
+Bypass all plugins in an existing session
-.SH FILES
 .TP
-.B ardour.rc
+\fB\-c\fR, \fB\-\-name\fR <name>
-Defaults and startup settings for Ardour.
+Use a specific backend client name, default is ardour
 .TP
-.B ardour_ui.rc
+\fB\-d\fR, \fB\-\-disable\-plugins\fR
-Definitions for the Ardour interface.
+Disable all plugins (safe mode)
-.SH ENVIRONMENT
 .TP
-.B ARDOUR_RC
+\fB\-D\fR, \fB\-\-debug\fR <options>
-Path to ardour.rc.
+Set debug flags. Use "\-D list" to see available options
 .TP
-.B ARDOUR_SYSTEM_RC
+\fB\-h\fR, \fB\-\-help\fR
-Path to the ardour_system.rc
+Print this message
 .TP
-.B LADSPA_PATH
+\fB\-k\fR, \fB\-\-keybindings\fR <file>
-Path to LADSPA plugins.
+Path to the key bindings file to load
-.SH BUGS
+.TP
-Yes.
+\fB\-m\fR, \fB\-\-menus\fR file
-http://tracker.ardour.org/ is the preferred bugtracker.
+Use "file" to define menus
-.SH AUTHOR
+.TP
-Paul Davis.
+\fB\-n\fR, \fB\-\-no\-splash\fR
-Do
+Do not show splash screen
-.I not
+.TP
-contact him directly.
+\fB\-N\fR, \fB\-\-new\fR session\-name
-Instead,
+Create a new session from the command line
-contact him at <ardour-dev@lists.ardour.org>.
+.TP
-You can subscribe here:
+\fB\-O\fR, \fB\-\-no\-hw\-optimizations\fR
+Disable h/w specific optimizations
+.TP
+\fB\-P\fR, \fB\-\-no\-connect\-ports\fR
+Do not connect any ports at startup
+.TP
+\fB\-S\fR, \fB\-\-sync\fR
+Draw the GUI synchronously
+.TP
+\fB\-T\fR, \fB\-\-template\fR <name>
+Use given template for new session
+.TP
+\fB\-v\fR, \fB\-\-version\fR
+Print version and exit
+.SH "REPORTING BUGS"
+Report bugs to http://tracker.ardour.org
 .br
-http://lists.ardour.org/listinfo.cgi/ardour-dev-ardour.org
+Website http://ardour.org