changed resource_to_close calls to resources_to_close for passenger >= 2.1
changed resource_to_close calls to resources_to_close for passenger >= 2.1

git-svn-id: 70c0b718c09296cad0cf258c7c3baebeee6f4020@54 2aabfe31-cc40-457c-aec7-21ad9ce7fb7d

curious/spawn,tra/spawnling,billfloat/spawn,rfc2822/spawn