Not able to use the wildchar "+" with http_listener

[ashwinravianandan]

Hello,

I am not able to use "+" wildchar in the URI fed to the http_listener. When I use the '*' wildchar, localhost is resolved but directly specifying the IP or 127.0.0.1 doesn't work. The exception message I receive is:
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<
what(): resolve: Host not found (authoritative)

Environment: linux amd64. Library version 2.9.1 ( built based on git tag )

[ashwinravianandan]

I have submitted a pull request that resolves this issue:
#447

[ras0219-msft]

Thanks for the PR!