Fix #3101.
Add clarifying comments in reactor_be_nothing.cc
Fix #3227 and a threading bug in semilattice_manager.tcc.
Remove unnecessary timeouts and delays in server_config.py and table_config.py.
Fix #3234
Add new table rethinkdb._debug_table_status
changing uuid to id in admin tables
changing machine to server
minor uuid->id and dead_machine_issues.py->dead_server_issues.py fixes
fixing some oversights in changing machine -> server
Use 'p == nullptr' instead of '!p'
Merge branch 'tim_3101' into reql_admin

Conflicts:
	src/clustering/administration/tables/table_status.cc
	src/clustering/reactor/reactor_be_nothing.cc
Merge branch 'tim/3227' into reql_admin

Conflicts:
	src/clustering/administration/servers/server_config.cc
	src/clustering/administration/servers/server_config.hpp
In rethinkdb._debug_table_status, use _earliest and _latest suffixes instead of _1 and _2 for incoherent versions.
removing docs/internal

over-the-shoulder from @danielmewes

Conflicts:
	docs/internal/clustering-reactor.txt
fix for #3219  build errors on Yosemite version of clang

over-the-shoulder by @danielmewes
Merge branch 'tim/debug_table_status' into reql_admin
updating table_status's ready_for_writes to be consistent with namespace_interface_t
Fix #3250 by removing unused 'backfill_progress: not_implemented' fields in table_status.

Informal CR by Daniel Mewes.
Merge branch 'reql_admin' of github.com:rethinkdb/rethinkdb into reql_admin