Modified Urls passed to the connection to address url building rules with Github Enterprise

currently does "http://example.github.com/api/v3/" + "/user"  =
"http://example.github.com/user".  Now builds properly using linux path
building rules "http://example.github.com/api/v3/" + "./user"  =
"http://example.github.com/api/v3/user"

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