1.17.10
add ruby-2.0.0-rc1, clean reading patch_level from db, improve detecting best ruby
fix rvm upgrade highest version detection, fix #1442
Merge pull request #1451 from hokkai7go/193p374

Add ruby-1.9.3-p374, closes #1452
add multilib patch for 1.9.3-p374, update #1451

Conflicts:
	scripts/functions/manage/ruby
binary rubies

Conflicts:
	config/md5
Merge branch 'hotfix/1.17.10' into stable