1.18.4
Merge pull request #1470 from ssm2017/patch-1

Update scripts/functions/requirements/ubuntu
rbx searches for the name in binaries, fix #1476
fix variables in 2f150aa, update #1476
make sure binary rubinius is filtered properly for weekly builds
Merge pull request #1475 from cwgem/openssl-flag-fix

Fix OpenSSL shared flag issue
Merge pull request #1474 from wayneeseguin/bugfix/curl_hanging_chef-rvm_136_and_157

try to fix curl problems
use __rvm_select instead of __rvm_ruby_string to get more ruby settings from the function, fix #1469
Merge branch 'hotfix/1.18.4' into stable