Merge pull request #270 from jay-hodgson/fix_build

fix server markdown utils test
SWC-489: pull heading inner html to style ToC items
include shiny.synapse.org in whitelist
Merge commit 'b4ad378' into release-1.24
Merge commit 'f4ff0d6' into release-1.24
Merge pull request #277 from jay-hodgson/release-1.24

SWC-489 and shiny site