Skeleton status files are installed read-only.  When copying to the config dir
upon initialization, make sure they end up writable.

--- byobu-5.127/usr/bin/byobu-janitor.in
+++ byobu-5.127/usr/bin/byobu-janitor.in
@@ -82,6 +82,7 @@
 	if [ ! -r "$BYOBU_CONFIG_DIR/$f" ]; then
 		# Copy from skeleton, if possible
 		cp -f "$BYOBU_PREFIX/share/$PKG/status/$f" "$BYOBU_CONFIG_DIR/$f"
+		chmod +w "$BYOBU_CONFIG_DIR/$f"
 	fi
 done
 
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<tr><td><span title='2016-07-23 22:19:11 +0200'>2016-07-23</span></td><td><a href='/guix/commit/gnu/packages/cook.scm?id=a000f3c4a80520027fd6f3cc4e5cd22a06716dcb'>gnu: cook: Update source URL.</a><span class='msg-avail'>...</span></td><td>Andreas Enge</td></tr>
<tr><td><span title='2015-11-13 23:45:55 +0800'>2015-11-13</span></td><td><a href='/guix/commit/gnu/packages/cook.scm?id=a124bbd2f41410e1c33654f4ff9865765baf28a7'>gnu: Adjust formatting as recommended by 'guix lint'.</a><span class='msg-avail'>...</span></td><td>宋文武</td></tr>