update: move -K option to -x

We need the former to be a bit more in line with the -B/-P options.

src/update/opnsense-update.8

@@ -24,7 +24,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd February 7, 2023
+.Dd June 8, 2023
 .Dt OPNSENSE-UPDATE 8
 .Os
 .Sh NAME
@@ -126,8 +126,6 @@ Otherwise, the
 utility is used to verify a set signature.
 The default is off meaning secure, unless the package mirror
 configuration does not use fingerprints.
-.It Fl K
-Return the subscription key if it exists in the release URL.
 .It Fl k
 Select the kernel.
 .It Fl L
@@ -209,6 +207,8 @@ after each individual step.
 Set debug mode for shell script output.
 .It Fl v
 Print the latest set version.
+.It Fl x
+Return the subscription key if it exists in the release URL.
 .It Fl z
 Use the snapshot directory to fetch sets regardless of what is
 currently configured in the repository file.

src/update/opnsense-update.sh.in

@@ -245,7 +245,7 @@ if [ "${IDENT}" != "${IDENT#*-}" ]; then
 	DO_DEVICE="-D ${IDENT#*-}"
 fi
 
-while getopts A:a:BbCcD:defGiKkLl:Mm:n:OPpRr:SsTt:UuVvz OPT; do
+while getopts A:a:BbCcD:defGiKkLl:Mm:n:OPpRr:SsTt:UuVvxz OPT; do
 	case ${OPT} in
 	A)
 		DO_MIRRORABI="-A ${OPTARG}"
@@ -286,9 +286,6 @@ while getopts A:a:BbCcD:defGiKkLl:Mm:n:OPpRr:SsTt:UuVvz OPT; do
 	i)
 		DO_INSECURE="-i"
 		;;
-	K)
-		DO_MIRROR="-K"
-		;;
 	k)
 		DO_KERNEL="-k"
 		;;
@@ -353,6 +350,9 @@ while getopts A:a:BbCcD:defGiKkLl:Mm:n:OPpRr:SsTt:UuVvz OPT; do
 	v)
 		DO_VERSION="-v"
 		;;
+	x)
+		DO_MIRROR="-x"
+		;;
 	z)
 		DO_SNAPSHOT="-z"
 		;;
@@ -438,7 +438,7 @@ if [ "${DO_MIRROR}" = "-M" ]; then
 	# only print mirror URL
 	mirror_abi
 	exit 0
-elif [ "${DO_MIRROR}" = "-K" ]; then
+elif [ "${DO_MIRROR}" = "-x" ]; then
 	# only print mirror subscription key while
 	# making sure it actually looks like a key
 	URL=$(mirror_abi raw | sed -n 's/.*\/\([^\/]*\)\/${ABI}\/.*/\1/p' |