ResourceLog Fix / Streamwalker Interface Improvements / Non-Root Config Initialization Fix

[gransom]

• Update to resourcelog tracking of operation chains, allowing for seemingly completed operations to be reissued. This closes a possible edge case associated with replaying the logfile of a failed marfs-rman invocation which had completed only the head element of an operation chain.
• Added proper cmdline support to streamwalker ( history, in-place cmd editing, tab completion, etc. ) via readline
• Minor change to avoid forcing recursive config verification by non-root instances
• Downgrade of mdal->statref() failures to informational only ( to avoid log overload when trying to see error messages )