yeah, yet another patch ... :-]

- fix config file name in $HOME; This didn't match the documentation.
  (doesn't cost us anything to check ~/.fg-submit first, and then ~/.fg-submitrc)
- don't use mktemp for the backup files. Some outdated distributions
  (Debian) come with a version that mandates six X, which is just too ugly.
  Just find the first free slot with sequential number. That isn't thread
  safe, but mktemp isn't either, so ...  (Should be using "lockfile", but
  its availability on CygWin is questionable. And it's not *that* important.)
- some more documentation
- some cleanup, too, of course

scripts/tools/fg-submit

@@ -100,9 +100,19 @@
 #     IGNORE *.old   # throw out the old files (and don't report
 #                    # that to the terminal)
 #
-# .fg-submit configuration files are sourced bash scripts, the
+#
+# .fg-submit configuration files are "sourced" bash scripts, the
 # keywords are simple shell functions. That means that you can
-# also use other bash commands in that file, such as "echo".
+# also use other bash commands in that file, such as "echo", or
+# write several commands on one line, separated with semicolon.
+# You can even put all special rules in your ~/.fg-submit file,
+# with rules depending on the working directory:
+#
+#     case "$PWD" in
+#     */bo105*)  DENY *.osg; ALLOW livery.xcf ;;
+#     */ufo*)    DENY *.tiff ;;
+#     esac
+#     DEFAULT
 
 
 
@@ -121,6 +131,7 @@ CVS=/usr/bin/cvs                 # avoid colorcvs wrapper from
 [ -x $CVS ] || CVS=cvs           # http://www.hakubi.us/colorcvs/
 UPLOAD=$(which fg-upload 2>/dev/null)
 
+CONFIG_FILE=".fg-submit"
 ARCHIVE=$BASE.tar.bz2
 DIFF=$BASE.diff
 CDIFF=$DIFF.bz2
@@ -140,9 +151,8 @@ DEFAULT_RULES="
 	-*.blend -*.blend[0-9] -*blend[0-9][0-9] -*.blend[0-9][0-9][0-9]
 	-*.gz -*.tgz -*.bz2 -*.zip -*.tar.gz* -*.tar.bz2*
 "
-# these rules are always appended; the last one accepts anything
+# these rules are always appended: ignore all hidden files that
-# (throw out all hidden files that weren't explicitly allowed, and
+# weren't explicitly allowed so far, and accept all the rest
-# accept the rest)
 POSTFIX_RULES="
 	!.* !*/.*
 	+*
@@ -192,6 +202,19 @@ function diffstat {
 	' <$1
 }
 
+function backup_filename {
+	i=1
+	while true; do
+		name=$1.$i
+		if ! [ -a "$name" ]; then
+			touch $name
+			echo $name
+			return
+		fi
+		i=$(($i + 1))
+	done
+}
+
 
 # set up accept/reject rules
 function DEFAULT { RULES="$RULES $DEFAULT_RULES"; }
@@ -202,8 +225,8 @@ function IGNORE  { for i in $*; do RULES="$RULES !$i"; done }
 RULES=
 HERE=$PWD
 while true; do
-	if [ -f .fg-submit ]; then
+	if [ -f $CONFIG_FILE ]; then
-		CONFIG="$PWD/.fg-submit"
+		CONFIG="$PWD/$CONFIG_FILE"
 		break
 	fi
 	cd ..
@@ -214,9 +237,12 @@ cd "$HERE"
 if [ "$CONFIG" ]; then
 	DEBUG "reading config $CONFIG"
 	source "$CONFIG"
-elif [ -f ~/.fg-submitrc ]; then
+elif [ -f ~/$CONFIG_FILE ]; then
-	DEBUG "reading config ~/.fg-submitrc"
+	DEBUG "reading config ~/$CONFIG_FILE"
-	source ~/.fg-submitrc
+	source ~/$CONFIG_FILE
+elif [ -f ~/${CONFIG_FILE}rc ]; then
+	DEBUG "reading config ~/${CONFIG_FILE}rc"
+	source ~/$CONFIG_FILE
 else
 	DEBUG "no config file found; using default rules"
 	RULES="$RULES $DEFAULT_RULES"
@@ -230,9 +256,9 @@ TMP=$(mktemp -d /tmp/$SELF.$BASE.XXXXXX) || (echo "$0: can't create temporary di
 trap "rm -rf $TMP" 0 1 2 3 13 15
 
 
-# move old files out of the way
+# move old files out of the way giving sequential suffixes
 for i in $DIFF $CDIFF $ARCHIVE; do
-	[ -f $i ] && mv $i $(mktemp $i.XXXXXX)
+	[ -f $i ] && mv $i $(backup_filename $i)
 done
 
 
@@ -279,7 +305,7 @@ grep "^? " $TMP/up|while read i; do
 done
 
 
-# classify and filter files
+# filter files according to the pattern rules
 if [ -f $TMP/check ]; then
 	for i in $(cat $TMP/check); do
 		DEBUG "checking whether file '$i' matches"
@@ -287,17 +313,17 @@ if [ -f $TMP/check ]; then
 			DEBUG "\t\trule $r"
 			R=${r#?}
 			case "!$i" in $r)
-				DEBUG "\t\t\t\"silently\" rejected\t\t(rule $R)"
+				DEBUG "\t\t\t\"silently\" rejected\t\t$R"
 				break
 				;;
 			esac
 			case "-$i" in $r)
-				REJECT "$i\t\t(rule $R)"
+				REJECT "$i\t\t$R"
 				break
 				;;
 			esac
 			case "+$i" in $r)
-				NEW "$i\t\t(rule $R)"
+				NEW "$i\t\t$R"
 				echo "$i" >>$TMP/files
 				break
 				;;