Clean up provisioned modules on error; refactor Run(); add Validate()

Modules that return an error during provisioning should still be cleaned
up so that they don't leak any resources they may have allocated before
the error occurred. Cleanup should be able to run even if Provision does
not complete fully.

1 files changed, 3 insertions, 3 deletions

diff --git a/sigtrap.go b/sigtrap.go
index 8fae706ad..76bb6664a 100644
--- a/sigtrap.go
+++ b/sigtrap.go
@@ -65,9 +65,9 @@ func gracefulStop(sigName string) {
 	os.Exit(exitCode)
 }
 
-// Exit codes. Generally, you will want to avoid
-// automatically restarting the process if the
-// exit code is 1.
+// Exit codes. Generally, you should NOT
+// automatically restart the process if the
+// exit code is ExitCodeFailedStartup (1).
 const (
 	ExitCodeSuccess = iota
 	ExitCodeFailedStartup