jar::CookieJar::iter test fails on Fedora

[ignatenkobrain]

failures:

---- src/jar.rs - jar::CookieJar::iter (line 320) stdout ----
thread 'src/jar.rs - jar::CookieJar::iter (line 320)' panicked at 'test executable failed:

thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `4`,
 right: `3`', src/jar.rs:19:1
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

', src/librustdoc/test.rs:372:17
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.


failures:
    src/jar.rs - jar::CookieJar::iter (line 320)

[SergioBenitez]

This is fixed by #111.