rename util/spkmodem-recv to spkmodem-decode

it's no longer resembling the original util at all,
so a rename seems indicated. yes.

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/spkmodem_decode/.gitignore

@@ -0,0 +1,2 @@
+spkmodem-recv
+spkmodem-decode

util/spkmodem_decode/Makefile

@@ -8,12 +8,12 @@ DESTDIR?=
 PREFIX?=/usr/local
 INSTALL?=install
 
-PROG=spkmodem-recv
+PROG=spkmodem-decode
 
 all: $(PROG)
 
-$(PROG): spkmodem-recv.c
+$(PROG): spkmodem-decode.c
-	$(CC) $(CFLAGS) spkmodem-recv.c -o $(PROG)
+	$(CC) $(CFLAGS) spkmodem-decode.c -o $(PROG)
 
 install: $(PROG)
 	mkdir -p $(DESTDIR)$(PREFIX)/bin/

util/spkmodem_decode/spkmodem-decode.c

@@ -22,7 +22,7 @@
  * decode.
  *
  * Usage example (NOTE: little endian!):
- * parec --channels=1 --rate=48000 --format=s16le | ./spkmodem-recv
+ * parec --channels=1 --rate=48000 --format=s16le | ./spkmodem-decode
  *
  * Originally provided by GNU GRUB, this version is a heavily
  * modified fork that complies with the OpenBSD Kernel Source
@@ -39,8 +39,17 @@
  * explain how the decoding works. This was done as an academic
  * exercise in 2023, continuing in 2026.
  *
- * This fork of spkmodem-recv is provided with Libreboot releases:
+ * This fork of spkmodem-recv, called spkmodem-decode, is provided
+ * with Libreboot releases:
  * https://libreboot.org/
+ *
+ * The original GNU version is here, if you're morbidly curious:
+ * https://cgit.git.savannah.gnu.org/cgit/grub.git/plain/util/spkmodem-recv.c?id=3dce38eb196f47bdf86ab028de74be40e13f19fd
+ *
+ * Libreboot's version was renamed to spkmodem-decode on 12 March 2026,
+ * since Libreboot's version no longer closely resembles the GNU
+ * version at all; ergo, a full rename was in order. GNU's version
+ * was called spkmodem-recv.
  */
 
 #define _POSIX_SOURCE

util/spkmodem_recv/.gitignore

@@ -1 +0,0 @@
-spkmodem-recv