Add a manpage to the generated package

Also, since a number of other packages use "thumbnailer for X" as a
description, change this package's description to use "thumbnailer
for X" instead of "generates thumbnails for X".

src/package/identity/usr/share/man/man1/jasc-pal-thumbnailer.1

@@ -0,0 +1,23 @@
+.TH JASC-PAL-THUMBNAILER 1 2021-07-24
+.SH NAME
+jasc-pal-thumbnailer \- thumbnailer for jasc palette files
+.SH SYNOPSIS
+\fBjasc-pal-thumbnailer\fR \fB-s\fR \fIDIM\fR [\fB-i\fR \fIINFILE\fR] [\fB-o\fR \fIOUTFILE\fR]
+.SH DESCRIPTION
+A GNOME thumbnailer that accepts a jasc palette file
+and generates a thumbnail that shows the colors in the palette
+.SH OPTIONS
+.TP
+.BR \-? ", " \-\-help
+Displays a help message and exits.
+.TP
+.BR \-s ", " \-\-size =\fIDIM\fR
+The pixel dimensions of the generated output file.
+.TP
+.BR \-i ", " \-\-input =\fIFILE\fR
+The input file.
+If not specified, reads from stdin.
+.TP
+.BR \-o ", " \-\-output =\fIFILE\fR
+The location to place the output file.
+If not specified, writes to stdout.

src/package/m4/DEBIAN/control.m4

@@ -7,4 +7,4 @@ Priority: optional
 Depends:
 Maintainer: Raymond Dodge
 Installed-Size: INSTALLED_SIZE
-Description: Generates thumbnails for JASC palette files
+Description: thumbnailer for JASC palette files