merge !91
authorDan Allen <dan@opendevise.com>
Wed, 28 Aug 2019 07:48:33 +0000 (07:48 +0000)
committerDan Allen <dan@opendevise.com>
Wed, 28 Aug 2019 07:48:33 +0000 (07:48 +0000)
resolves #95 prepend site path when resolving relative URL if from is undefined or empty

related to https://gitlab.com/antora/antora/issues/258


Trivial merge