merge revision(s) 42639: [Backport #8805]

	* gc.c (getrusage_time): Fallback clock_gettime to getrusage when
	  clock_gettime fails.
	  Reported by Eric Saxby.  [ruby-core:56762] [Bug #8805]
	  


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42653 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 42100: [Backport #8806]

	* ext/date/date_parse.c (rfc2822_cb): check if wday is given, since it
	  can be omitted.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@42654 b2dd03c8-39d4-4d8f-98ff-823fe69b080e