web: push a file in default handler
web: push a file in default handler

If we match the default handler, interpret the match
string as the file. If the match string is empy (i.e. root content
access) return whatever is in file index.html.

If the file is found, push it to the client. Otherwise,
push 404 error.

Signed-off-by: Ilija Hadzic <47a09d4a4430975766160361f65fc72633be50b6@gmail.com>

ihadzic/jim,ihadzic/jim,ihadzic/jim