Unescaping URI characters in proxy auth.
Fix #14: connection pool tries to reuse closed connections

If a reply contains a "Connection: close" header, the connection is
closed and removed from the connection pool.  This fixes the problem
where HTTP tried to reuse connections that had been closed at the
server end, leading to "broken pipe" errors.
tweak end of 3rd paragraph of description
Merge pull request #50 from juhp/patch-2

tweak end of 3rd paragraph of description
Merge pull request #49 from ian-ross/issue-14

Fix #14: connection pool tries to reuse closed connections
Merge branch 'master' of https://github.com/zmthy/HTTP into zmthy-master
Bump version to 4000.2.11