url: revert reslove urls with . and ..

This reverts commit ad068480.

Initially, this bug fix targeted master, and I pushed to have it
included in v0.10. In retrospect, I'm not sure it should have made into
v0.10 as it seems it could break a lot of existing working code.

In my opinion, this change is still a bug fix, and it is not backward
incompatible per se. However, I'm not sure that taking the risk to break
a lot of users with a new 0.10.x release that would include this fix is
reasonable, especially now that 0.10.x releases are entering
maintenance mode.

PR-URL: https://github.com/joyent/node/pull/9257


Reviewed-by: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>