Finalize removal of memory debug flags size and mctx

Commit 4b3d0c6600 has removed them, but
did not remove few traces in documentation and help. Remove them from
remaining places.

(cherry picked from commit 65b9eeb39a)

bin/dnssec/dnssec-keygen.c

@@ -194,7 +194,7 @@ usage(void) {
 			"(default: AUTHCONF)\n");
 	fprintf(stderr, "    -h: print usage and exit\n");
 	fprintf(stderr, "    -m <memory debugging mode>:\n");
-	fprintf(stderr, "       usage | trace | record | size | mctx\n");
+	fprintf(stderr, "       usage | trace | record\n");
 	fprintf(stderr, "    -v <level>: set verbosity level (0 - 10)\n");
 	fprintf(stderr, "    -V: print version information\n");
 	fprintf(stderr, "Timing options:\n");

bin/named/main.c

@@ -313,7 +313,7 @@ usage(void) {
 			"             [-S sockets] [-t chrootdir] [-u "
 			"username] [-U listeners]\n"
 			"             [-m "
-			"{usage|trace|record|size|mctx}]\n"
+			"{usage|trace|record}]\n"
 			"             [-M fill|nofill]\n"
 			"usage: named [-v|-V|-C]\n");
 }

bin/named/named.rst

@@ -117,7 +117,7 @@ Options
 .. option:: -m flag
 
    This option turns on memory usage debugging flags. Possible flags are ``usage``,
-   ``trace``, ``record``, ``size``, and ``mctx``. These correspond to the
+   ``trace`` and ``record``. These correspond to the
    ``ISC_MEM_DEBUGXXXX`` flags described in ``<isc/mem.h>``.
 
 .. option:: -n #cpus

bin/tests/wire_test.c

@@ -62,7 +62,7 @@ fromhex(char c) {
 static void
 usage(void) {
 	fprintf(stderr, "wire_test [-b] [-d] [-p] [-r] [-s]\n");
-	fprintf(stderr, "          [-m {usage|trace|record|size|mctx}]\n");
+	fprintf(stderr, "          [-m {usage|trace|record}]\n");
 	fprintf(stderr, "          [filename]\n\n");
 	fprintf(stderr, "\t-b\tBest-effort parsing (ignore some errors)\n");
 	fprintf(stderr, "\t-d\tRead input as raw binary data\n");