Merged revisions 33801,33803,33805 via svnmerge from

https://www.dev.java.net/svn/hudson/branches/rc

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  r33801 | kohsuke | 2010-08-13 15:14:41 -0700 (Fri, 13 Aug 2010) | 3 lines
  
  restrictions on label names should be consistent with other restrictions that we have.
  
  In particular, allow '-'.
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  r33803 | kohsuke | 2010-08-13 15:24:42 -0700 (Fri, 13 Aug 2010) | 1 line
  
  make sure '-' is allowed as label names
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  r33805 | kohsuke | 2010-08-13 16:53:49 -0700 (Fri, 13 Aug 2010) | 1 line
  
  fixed a regression in IE6.
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git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@33809 71c3de6d-444a-0410-be80-ed276b4c234a