Add workaround for non-gui environments to glabels-batch manpage. (#68)

user-docs/_build/man/glabels-batch-qt.1

@@ -1,6 +1,6 @@
 .\" Man page generated from reStructuredText.
 .
-.TH "GLABELS-BATCH-QT" "1" "May 05, 2019" "" "gLabels"
+.TH "GLABELS-BATCH-QT" "1" "Nov 27, 2019" "" "gLabels"
 .SH NAME
 glabels-batch-qt \- batch creation of labels and business cards
 .
@@ -56,7 +56,7 @@ Send output to <printer>.
 .UNINDENT
 .INDENT 0.0
 .TP
-.B \-o <filename>, \-\-output <filename>
+.B \-o [<filename>], \-\-output [<filename>]
 Set output filename to <filename>. Set to "\-" for stdout.
 (Default="output.pdf")
 .UNINDENT
@@ -90,6 +90,11 @@ Print crop marks.
 .B \-r, \-\-reverse
 Print in reverse (mirror image).
 .UNINDENT
+.INDENT 0.0
+.TP
+.B \-D <var>=<value>, \-\-define <var>=<value>
+Set initial value of user variable <var> to <value>.
+.UNINDENT
 .SH FILES
 .INDENT 0.0
 .TP
@@ -110,6 +115,19 @@ Directory for manually created product templates.
 .UNINDENT
 .SH BUGS
 .sp
+On GNU/Linux platforms, \fBglabels\-batch\-qt\fP must be run from within a windowing environment, such as X or Wayland.  This is because Qt requires a suitable platform to obtain system font information.  A work\-around is to run \fBglabels\-batch\-qt\fP using a virtual X server environment:
+.INDENT 0.0
+.INDENT 3.5
+.sp
+.nf
+.ft C
+xvfb\-run glabels\-batch\-qt \-o output.pdf myProject.glabels
+.ft P
+.fi
+.UNINDENT
+.UNINDENT
+.SH REPORTING BUGS
+.sp
 Bugs and feature requests can be reported via the gLabels issue tracking system at GitHub (<\fI\%https://github.com/jimevins/glabels\-qt/issues\fP>).  You will need a GitHub account to submit new issues or to comment on existing issues.
 .SH SEE ALSO
 .sp

user-docs/_build/man/glabels-qt.1

@@ -1,6 +1,6 @@
 .\" Man page generated from reStructuredText.
 .
-.TH "GLABELS-QT" "1" "May 05, 2019" "" "gLabels"
+.TH "GLABELS-QT" "1" "Nov 27, 2019" "" "gLabels"
 .SH NAME
 glabels-qt \- create labels and business cards
 .
@@ -67,7 +67,7 @@ templates here!\fP
 .B ${HOME}/.glabels/
 Directory for manually created product templates.
 .UNINDENT
-.SH BUGS
+.SH REPORTING BUGS
 .sp
 Bugs and feature requests can be reported via the gLabels issue tracking system at GitHub (<\fI\%https://github.com/jimevins/glabels\-qt/issues\fP>).  You will need a GitHub account to submit new issues or to comment on existing issues.
 .SH SEE ALSO