Fix request cache-control to match spec.

Fixes https://github.com/square/okhttp/issues/1081
Merge pull request #1112 from square/jwilson_1101_cachepolicy

Fix request cache-control to match spec.
Change the cache to have non-shared semantics.

This means we'll cache responses that use an 'Authorization' header. This
means OkHttp's cache shouldn't be used on middleboxes that sit between
user agents and the origin server; in practice this is never a use case
for OkHttp.

Fixes https://github.com/square/okhttp/issues/1035
Merge pull request #1113 from square/jwilson_1101_not_shared

Change the cache to have non-shared semantics.
Don't close the SPDY peer too early.

This was occasionally causing tests to fail because the test was
observing the connection close.
Merge pull request #1116 from square/jwilson_1102_peer_close

Don't close the SPDY peer too early.
Attempt to improve MockWebServer reliability.

Use the same InetAddress when binding to a port as when offering the
MockWebServer's address.

Wait for the executors to all shutdown before returning from shutdown().
Merge pull request #1115 from square/jwilson_1102_mws_reliability

Attempt to improve MockWebServer reliability.
Don't skip the callback if a call is canceled.
Merge pull request #1117 from square/jwilson_1102_cancel

Don't skip the callback if a call is canceled.
Fix a typo in settings documentation.

Closes https://github.com/square/okhttp/issues/1105
Be consistent about host names in RouteSelector.

Use the host specified by the address, and not URI.getHost().

bug: 18023709
Change-Id: I2c39c2ce89049130dc00047c8de6f214159144c0
Fix a concurrency bug in SPDY settings.

We were making a copy of the streams HashMap so that we could
iterate it safely after releasing our lock. But we weren't
actually using that copy when iterating. Whoops!

Fixes https://github.com/square/okhttp/issues/1119
Merge pull request #1121 from square/jwilson_1103_routeselector

Be consistent about host names in RouteSelector.
Merge pull request #1122 from square/jwilson_1103_use_copy

Fix a concurrency bug in SPDY settings.
Merge pull request #1120 from square/jwilson_1103_settings_tpyo

Fix a typo in settings documentation.
Import DiskLruCache tests.

See https://github.com/JakeWharton/DiskLruCache/blob/master/src/test/java/com/jakewharton/disklrucache/DiskLruCacheTest.java
Merge pull request #1123 from square/jwilson_1103_import_disklrucache_tests

Import DiskLruCache tests.
Implement DiskLruCache.evictAll and expose it in Cache.

Closes https://github.com/square/okhttp/issues/257
Merge pull request #1124 from square/jwilson_1104_evictall

Implement DiskLruCache.evictAll and expose it in Cache.