Unblocked revisions 80421 via svnmerge

........
  r80421 | victor.stinner | 2010-04-23 23:41:56 +0200 (ven., 23 avril 2010) | 3 lines

  Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates and
  bytes strings for environment keys and values
........