* Allow pushing multiple resources via Link header
* Add nopush test case
* Extract Link header parsing to separate function
* Parser regexp-free
* Remove dead code, thx gometalinter
* Redundant condition - won't happen
* Reduce duplication
Use httpserver.IndexFile() to determine index files
Test if middleware pushes indexfile when requesting directory
Fix codereview issues
Serve original request first, push later
Revert "Serve original request first, push later"
This reverts commit 2c66f01115747e5665ba7f2d33e2fd551dc31877.