bugfix: turning a peer up via set_peer_down() did not reset the peer'…

…s "fails" counter, which might get the peer to be marked down again prematurely.

Signed-off-by: Yichun Zhang (agentzh) <agentzh@gmail.com>

bugfix: turning a peer up via set_peer_down() did not reset the peer'…

…s "fails" counter, which might get the peer to be marked down again prematurely.

Signed-off-by: Yichun Zhang (agentzh) <agentzh@gmail.com>

doc: now we work with nginx 1.11.2.

documented the dynamic module support in README.

doc: minor tweaks.

doc: updated the copyright years.

updated docs to reflect recent changes.

doc: mentioned the lua-resty-upstream-healthcheck library that makes …

…use of this module.