[zeek/spicy] b2f013: Add environment variable to omit CFG dataflow.

[Evan Typanski]

Branch: refs/heads/topic/etyp/omit-cfg-dataflow
Home: https://github.com/zeek/spicy
Commit: b2f0131b105798189311c9a522dcbeccb488ff84
https://github.com/zeek/spicy/commit/b2f0131b105798189311c9a522dcbeccb488ff84
Author: Evan Typanski <evan.t...@corelight.com>
Date: 2025-09-17 (Wed, 17 Sep 2025)

Changed paths:
M doc/toolchain.rst
M hilti/toolchain/include/compiler/detail/cfg.h
M hilti/toolchain/src/compiler/cfg.cc
A tests/Baseline/hilti.cfg.no-dataflow/output
A tests/hilti/cfg/no-dataflow.hlt

Log Message:
-----------
Add environment variable to omit CFG dataflow.

Closes #2158

It gets really annoying to have dataflow facts when they're not getting
used, so this adds an environment variable to disable them.


Commit: 95f2bbd6c84c2a1f9e753bdeea1f76adef20d311
https://github.com/zeek/spicy/commit/95f2bbd6c84c2a1f9e753bdeea1f76adef20d311
Author: Evan Typanski <evan.t...@corelight.com>
Date: 2025-09-17 (Wed, 17 Sep 2025)

Changed paths:
M hilti/toolchain/src/compiler/optimizer.cc

Log Message:
-----------
Cleanup some optimizer code.

This includes a fix for a Coverity issue that shouldn't flag since
`succ_node` is directly from the graph.


Compare: https://github.com/zeek/spicy/compare/b0e2268a427d...95f2bbd6c84c

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