consolidate testing options behind common switch

don't pollute the namespace with random uppercase switches. instead,
have a new -T switch with suboptions, just like -D.

src/main.c

@@ -710,12 +710,21 @@ main( int argc, char **argv )
 				op = DEBUG_ALL | VERBOSE;
 			DFlags |= op;
 			break;
-		case 'J':
-			DFlags |= KEEPJOURNAL;
-			JLimit = strtol( ochar, &ochar, 10 );
-			break;
-		case 'Z':
-			DFlags |= ZERODELAY;
+		case 'T':
+			for (; *ochar; ) {
+				switch (*ochar++) {
+				case 'j':
+					DFlags |= KEEPJOURNAL;
+					JLimit = strtol( ochar, &ochar, 10 );
+					break;
+				case 'z':
+					DFlags |= ZERODELAY;
+					break;
+				default:
+					error( "Unknown -T flag '%c'\n", *(ochar - 1) );
+					return 1;
+				}
+			}
 			break;
 		case 'v':
 			version();

src/run-tests.pl

@@ -345,7 +345,7 @@ sub runsync($$)
 	} else {
 		$flags .= " -D";
 	}
-	$cmd .= "$mbsync -Z $flags -c .mbsyncrc test";
+	$cmd .= "$mbsync -Tz $flags -c .mbsyncrc test";
 	open FILE, "$cmd 2>&1 |";
 	my @out = <FILE>;
 	close FILE or push(@out, $! ? "*** error closing mbsync: $!\n" : "*** mbsync exited with signal ".($?&127).", code ".($?>>8)."\n");
@@ -692,7 +692,7 @@ sub test($$$@)
 
 	mkchan($$sx[0], $$sx[1], @{ $$sx[2] });
 
-	my ($xc, @ret) = runsync("-J", "1-initial.log");
+	my ($xc, @ret) = runsync("-Tj", "1-initial.log");
 	if ($xc || ckchan("near/.mbsyncstate.new", $tx)) {
 		print "Input:\n";
 		printchan($sx);
@@ -752,7 +752,7 @@ sub test($$$@)
 	for (my $l = 1; $l <= $njl; $l++) {
 		mkchan($$sx[0], $$sx[1], @{ $$sx[2] });
 
-		my ($nxc, @nret) = runsync("-J$l", "4-interrupt.log");
+		my ($nxc, @nret) = runsync("-Tj$l", "4-interrupt.log");
 		if ($nxc != (100 + ($l & 1)) << 8) {
 			print "Interrupting at step $l/$njl failed.\n";
 			print "Debug output:\n";
@@ -760,7 +760,7 @@ sub test($$$@)
 			exit 1;
 		}
 
-		($nxc, @nret) = runsync("-J", "5-resume.log");
+		($nxc, @nret) = runsync("-Tj", "5-resume.log");
 		if ($nxc || ckchan("near/.mbsyncstate.new", $tx)) {
 			print "Resuming from step $l/$njl failed.\n";
 			print "Input:\n";