Change JMX domain for metrics to the o.s.m package
Document doc-only for jvmcfg properties
Bumping err to 20 seconds
Fix headers to use '##'
Add Ice overrides section
Add corrections for S&B
Add link to Ice properties
Merge pull request #2864 from joshmoore/rebased/develop/minor-adv-cfg-fixes

Minor configuration fixes (rebased onto develop)