DOCS-4359 shell helpers

Conflicts:
	config/redirects.yaml
	source/includes/options-conf.yaml
	source/reference/command/setParameter.txt
	source/reference/parameters.txt
trivial: ending line
DOCS-4408: options configuration for storageEngine and dbPath compatibility
DOCS-4451: correct wt string
DOCS-4410: mongodump --repair does not work with mongos
DOCS-4307 explain results, retry, and cleanup ref to old explain results
DOCS-4294: mmapv1 dbstats output
initia cut of changes to tools