sl/glconf: introduce "allow_cyclic_trace_graph" option

... as a run-time equivalent to SE_ALLOW_CYCLIC_TRACE_GRAPH
sl/glconf: introduce "allow_three_way_join" option

... as a run-time equivalent to SE_ALLOW_THREE_WAY_JOIN
sl/glconf: introduce "forbid_heap_replace" option

... as a run-time equivalent to SE_FORBID_HEAP_REPLACE
sl/glconf: introduce "int_arithmetic_limit" option

... as a run-time equivalent to SE_INT_ARITHMETIC_LIMIT
sl/glconf: introduce "join_on_loop_edges_only" option

... as a run-time equivalent to SE_JOIN_ON_LOOP_EDGES_ONLY
sl/glconf: introduce "state_live_ordering" option

... as a run-time equivalent to SE_STATE_ON_THE_FLY_ORDERING
sl/glconf: introduce "detect_containers" option

... and the contplot.sh script to use it easily
sl/config.h: enable SH_PREVENT_AMBIGUOUS_ENT_ID by default

It is required by the "detect_containers" run-time option.