simple PRs with maintainer patches for commits

[Dave Cottlehuber]

Could these 2 PRs get a committer please? I'm the maintainer for both.
No upstream changes, just ports-related improvements.

www/h2o:
- support integrated mruby & clean up option handling
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213733

net-mgmt/riemann:
- fix reload under daemon(8) using pkill
- use new upstream master site
- add conf.d for more complex configurations
- add named daemon(8) process info
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212671

A+
Dave