Update rust
Touch rust-auto-clean-trigger
Update rust-core-foundation
auto merge of #885 : brson/servo/master, r=brson,metajack

This is to pick up DNS support, though it's not enabled in this PR. The big change here is in the compositor. GLFW uses owned closures now and we're sharing the Window object with them via TLS.
Resolve host names
auto merge of #887 : brson/servo/master, r=metajack
Handle doctype.textContent correctly.

I confused Doctype and DocumentFragment nodes when implementing.
Fix unused import warnings.
auto merge of #890 : Ms2ger/servo/textcontent-getter-bug, r=jdm

I confused Doctype and DocumentFragment nodes when implementing.
auto merge of #891 : Ms2ger/servo/unused-import-warnings, r=jdm