Add site path to redirects

[frederickcxa]

Normalizes redirect path when a site has a path in its confi.yaml.

Closes #557

[coveralls]

Pull Request Test Coverage Report for Build 1899

• 33 of 33 (100.0%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 1866:	0.0%
Covered Lines:	4474
Relevant Lines:	4474

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💛 - Coveralls