Fix minor issues and optimizations suggested by FindBugs and NetBeans

Ludovic Poitou

03.47.2012 f9fed74b9c891071a44bb01087b40693402f6c43

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INFO_LDIF_CONNHANDLER_RESULT_CODE_450=Kod Rezultatu: %d (%s)
NOTICE_LDAP_CONNHANDLER_STARTED_LISTENING_276=Rozpocz\u0119to nas\u0142uchiwanie nowych po\u0142\u0105cze\u0144 na %s
INFO_LDIF_CONNHANDLER_MATCHED_DN_452=Pasuj\u0105ce DN:  %s