[ruby-cvs:61516] naruse:r54354 (ruby_2_3): merge revision(s) 53346, 53347, 53348, 53349, 53391, 53928: [Backport #11898]

[naruse at ruby-lang.org]

naruse	2016-03-29 14:05:34 +0900 (Tue, 29 Mar 2016)

  New Revision: 54354

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=54354

  Log:
    merge revision(s) 53346,53347,53348,53349,53391,53928: [Backport #11898]
    
    * process.c: use rb_w32_uchdir() instead of plain chdir() on Windows.
      reported by naruse via twitter.
    
    * process.c (rb_execarg_addopt): need to convert to ospath.
    
    * process.c (rb_execarg_parent_start1): need to convert the encoding to
      ospath's one.
    
    * process.c (rb_execarg_addopt): need to convert the encoding to
      ospath's one.

  Modified directories:
    branches/ruby_2_3/
  Modified files:
    branches/ruby_2_3/ChangeLog
    branches/ruby_2_3/test/ruby/test_process.rb
    branches/ruby_2_3/version.h