airbnb/nerve — pull request #48 by deverton (2014-04-02 04:08:56+00:00)
Title: Add content check to HttpServiceCheck.

Introduces a new HttpServiceCheck configuration parameter called ```expect``` which is string value to expect in the server response.

In addition to checking for a status code in the [200,300) range, it also verifies a given string is contained in the response. This is similar to the HAProxy ```http-check expect string``` configuration.