Remove obsolete 'rump_cgdconf' script

Using the rumpkernel's CGD device has been unsupported for a while
by now.

Issue #5480.

tool/rump_cgdconf

@@ -1,113 +0,0 @@
-#!/bin/sh
-#
-# \brief  Create cgdconfig(8) configuration file from key or extract the key
-#         from the specified configuration file
-# \author Josef Soentgen
-# \date   2014-04-29
-#
-#
-# Note: This script is merely just a awk(1) wrapper and only generates a
-#       aes-cbc 256 storedkey configuration and expects the given key to
-#       be a proper base64 encoded key generated by cgdconfig(8).
-#
-
-
-#
-# Print usage
-#
-print_usage() {
-	local help=$1
-	printf "usage: $PROG_NAME [-h] <-f file|-k key>\n"
-	if [ "$help" != "" ]; then
-		printf "\t-h       show this help screen\n"
-		printf "\t-k key   generate config file from key and print "
-		printf "to stdout\n"
-		printf "\t-f file  extract key from config file and print "
-		printf "to stdout\n"
-	fi
-}
-
-
-#
-# Parse arguments given on the commandline
-#
-parse_arguments() {
-	local args="$(getopt hf:k: ${*})"
-
-	[ $? != 0 ] && exit 1
-	if [ $# -lt 1 ]
-	then
-		print_usage
-		exit 1
-	fi
-	set -- $args
-	while [ $# -ge 0 ]; do
-		case "$1" in
-		-h)
-			print_usage "help"
-			exit 0;;
-		-k) ARG_KEY="$2"; shift; shift;;
-		-f) ARG_FILE="$2"; shift; shift;;
-		--) shift; break;;
-		esac
-	done
-}
-
-
-#
-# Extract the key string from the configuration file
-#
-extract_key() {
-	local cgd_file="$1"
-
-	awk 'BEGIN { found=0 }
-	{
-		if (found == 1) key=key $1
-		if ($1 == "keygen") { found=1; key=$4 }
-	}
-	END { sub(/;$/, "", key); print key }' $cgd_file
-}
-
-
-#
-# Generate a proper cgd(8) configuration file from the given key
-#
-generate_conf() {
-	local key="$1"
-
-	printf "$key" | awk '{ key=$0 }
-	END {
-		printf("algorithm aes-cbc;\n")
-		printf("iv-method encblkno1;\n")
-		printf("keylength 256;\n")
-		printf("verify_method none;\n")
-		printf("keygen storedkey key ")
-		printf("%s \\\n", substr(key, 1, 30))
-		printf("                     %s;\n", substr(key, 31))
-	}'
-}
-
-
-main() {
-	parse_arguments "$@"
-
-	if [ "$ARG_FILE" != "" ]; then
-		extract_key "$ARG_FILE"
-	fi
-
-	if [ "$ARG_KEY" != "" ]; then
-		generate_conf "$ARG_KEY"
-	fi
-}
-
-
-PROG_NAME=$(basename $0)
-
-ARG_FILE=
-ARG_KEY=
-
-main "$@"
-
-exit 0
-
-# End of file