Dont use logger in options parsing, fixes #1335

lib/sidekiq/cli.rb

@@ -326,8 +326,9 @@ module Sidekiq
       end
       ns = opts.delete(:namespace)
       if ns
-        Sidekiq.logger.warn("namespace should be set in your ruby initializer, is ignored in config file")
-        Sidekiq.logger.warn("config.redis = { :url => ..., :namespace => '#{ns}' }")
+        # logger hasn't been initialized yet, puts is all we have.
+        puts("namespace should be set in your ruby initializer, is ignored in config file")
+        puts("config.redis = { :url => ..., :namespace => '#{ns}' }")
       end
       opts
     end

test/config.yml

@@ -3,7 +3,6 @@
 :require:      ./test/fake_env.rb
 :pidfile:      /tmp/sidekiq-config-test.pid
 :logfile:      /tmp/sidekiq.log
-:namespace:    sidekiq
 :concurrency:  50
 :queues:
   - [<%="very_"%>often, 2]