Make 'clean' and 'update' commands rather than options. Invoke 'update'

(but not 'clean') in all setups.  Bump tinderbox.pl version to 2.1, mostly
for the 'release' command added in the previous commit.

tools/tools/tinderbox/tbmaster.pl

@@ -38,7 +38,7 @@ my %CONFIGS	= (
     # Global settings
     'global' => {
 	'LOGDIR'	=> '/home/des/public_html',
-	'OPTIONS'	=> [ '--update', '--verbose' ],
+	'OPTIONS'	=> [ '--verbose' ],
 	'EMAIL'		=> 'des+%%arch%%-%%branch%%@freebsd.org',
 	'ENV'		=> { },
     },
@@ -46,7 +46,7 @@ my %CONFIGS	= (
     'cueball' => {
 	'COMMENT'	=> "-CURRENT tinderbox",
 	'BRANCHES'	=> [ 'CURRENT' ],
-	'TARGETS'	=> [ 'world', 'generic', 'lint' ],
+	'TARGETS'	=> [ 'update', 'world', 'generic', 'lint' ],
 	'ARCHES'	=> {
 	    'alpha'	=> [ 'alpha' ],
 	    'i386'	=> [ 'i386', 'pc98' ],
@@ -59,7 +59,7 @@ my %CONFIGS	= (
     'triangle' => {
 	'COMMENT'	=> "-STABLE tinderbox",
 	'BRANCHES'	=> [ 'RELENG_4' ],
-	'TARGETS'	=> [ 'world', 'generic', 'lint' ],
+	'TARGETS'	=> [ 'update', 'world', 'generic', 'lint' ],
 	'ARCHES'	=> {
 	    'alpha'	=> [ 'alpha' ],
 	    'i386'	=> [ 'i386', 'pc98' ],
@@ -73,7 +73,7 @@ my %CONFIGS	= (
     '9ball' => {
 	'COMMENT'	=> "Experimental platforms",
 	'BRANCHES'	=> [ 'CURRENT' ],
-	'TARGETS'	=> [ 'world', 'generic', 'lint' ],
+	'TARGETS'	=> [ 'update', 'world', 'generic', 'lint' ],
 	'ARCHES'	=> {
 	    'amd64'	=> [ 'amd64' ],
 	    'powerpc'	=> [ 'powerpc' ],
@@ -87,7 +87,7 @@ my %CONFIGS	= (
     'ada' => {
 	'COMMENT'	=> "Tinderbox development",
 	'BRANCHES'	=> [ 'RELENG_4' ],
-	'TARGETS'	=> [ 'world', 'lint', 'release' ],
+	'TARGETS'	=> [ 'update', 'world', 'lint', 'release' ],
 	'ARCHES'	=> {
 	    'i386'	=> [ 'i386' ],
 	},
@@ -106,7 +106,7 @@ my %CONFIGS	= (
     'dwp' => {
 	'COMMENT'	=> "Tinderbox development",
 	'BRANCHES'	=> [ 'CURRENT' ],
-	'TARGETS'	=> [ 'world', 'lint', 'release' ],
+	'TARGETS'	=> [ 'update', 'world', 'lint', 'release' ],
 	'ARCHES'	=> {
 	    'i386'	=> [ 'i386' ],
 	},

tools/tools/tinderbox/tinderbox.pl

@@ -35,7 +35,7 @@ use Fcntl qw(:DEFAULT :flock);
 use POSIX;
 use Getopt::Long;
 
-my $VERSION	= "2.0";
+my $VERSION	= "2.1";
 my $COPYRIGHT	= "Copyright (c) 2003 Dag-Erling Smørgrav. " .
 		  "All rights reserved.";
 
@@ -54,6 +54,8 @@ my $verbose;			# Verbose mode
 my %userenv;
 
 my %cmds = (
+    'clean'	=> 0,
+    'update'	=> 0,
     'world'	=> 0,
     'generic'	=> 0,
     'lint'	=> 0,
@@ -237,8 +239,6 @@ Usage:
   $0 [options] [parameters] command [...]
 
 Options:
-  -c, --clean                   Clean sandbox before building
-  -u, --update                  Update sources before building
   -v, --verbose                 Verbose mode
 
 Parameters:
@@ -252,6 +252,8 @@ Parameters:
   -s, --sandbox=DIR             Location of sandbox
 
 Commands:
+  clean                         Clean the sandbox
+  update                        Update the source tree
   world                         Build the world
   generic                       Build the GENERIC kernel
   lint                          Build the LINT kernel
@@ -282,14 +284,12 @@ MAIN:{
     GetOptions(
 	"a|arch=s"	        => \$arch,
 	"b|branch=s"		=> \$branch,
-	"c|clean"		=> \$clean,
 	"d|date=s"		=> \$date,
 	"j|jobs=i"		=> \$jobs,
 	"l|logfile=s"		=> \$logfile,
 	"m|machine=s"		=> \$machine,
 	"r|repository=s"	=> \$repository,
 	"s|sandbox=s"		=> \$sandbox,
-	"u|update"		=> \$update,
 	"v|verbose+"		=> \$verbose,
 	) or usage();
 
@@ -361,20 +361,22 @@ MAIN:{
     $SIG{__WARN__} = \&sigwarn;
 
     # Clean up remains from old runs
-    if ($clean) {
+    if ($cmds{'clean'}) {
-	logstage("cleaning up sandbox");
+	logstage("cleaning the sandbox");
 	remove_dir("$sandbox/src")
 	    or error("unable to remove old source directory");
 	remove_dir("$sandbox/obj")
 	    or error("unable to remove old object directory");
+	remove_dir("$sandbox/root")
+	    or error("unable to remove old chroot directory");
 	make_dir("$sandbox/obj")
 	    or error("$sandbox/obj: $!");
     }
 
     # Check out new source tree
-    if ($update) {
+    if ($cmds{'update'}) {
 	cd("$sandbox");
-	logstage("checking out sources");
+	logstage("checking out the source tree");
 	my @cvsargs = (
 	    "-f",
 	    "-R",