[DOCS] Is key_logfile meant to be a deprecated minion/master config option?

Description

This was discovered as part of working on #58112

Not sure what is going on here:

https://github.com/saltstack/salt/blob/8afbb8e00556e0d491f6052308469e9f4a0c7672/salt/config/__init__.py#L1486-L1487

This option has a comment saying it was meant to be removed long ago, first introduced as a comment 7 years ago:

• Commit: 9a4ce0ea9d90f659d1a4036cb2c046171535292f

Either this is meant to be deprecated or it is meant to stay.

Suggested Fix

If it is meant to stay:

• Remove the comment
• Add the appropriate information needed to the minion/master confs that support it, and the associate .rst files

If it is meant to go, create a deprecation path.

• Create a deprecation path

Type of documentation

• minion/master configuration files
• Salt Documentation (.rst) for master/minion configuration files

Location or format of documentation

https://github.com/saltstack/salt/blob/8afbb8e00556e0d491f6052308469e9f4a0c7672/salt/config/__init__.py#L1486-L1487

Depending on what path is taken on what will be done with the option, the following files may be impacted in docs:

Master:

• https://github.com/saltstack/salt/blob/master/conf/master
• https://github.com/saltstack/salt/blob/master/doc/ref/configuration/master.rst
  • Rendered HTML: https://docs.saltstack.com/en/latest/ref/configuration/master.html

Minion:

• https://github.com/saltstack/salt/blob/master/conf/minion
• https://github.com/saltstack/salt/blob/master/doc/ref/configuration/minion.rst
  • Rendered HTML: https://docs.saltstack.com/en/latest/ref/configuration/minion.html

Additional context

Assigning Pedro since past-Pedro seemed to know something about this back in an earlier time of Salt land, when version numbers were much smaller and elsewhere on the periodic table.

If it does go the deprecation path, it appears in several places as being used:

20:24 $ grep -Inr "key_logfile" | grep -v "_build"
salt/utils/parsers.py:2483:    _logfile_config_setting_name_ = "key_logfile"
salt/config/__init__.py:178:        # key_logfile, pidfile:
salt/config/__init__.py:709:        "key_logfile": str,
salt/config/__init__.py:1486:        # XXX: Remove 'key_logfile' support in 2014.1.0
salt/config/__init__.py:1487:        "key_logfile": os.path.join(salt.syspaths.LOGS_DIR, "key"),
salt/config/__init__.py:2361:    for config_key in ("log_file", "key_logfile", "syndic_log_file"):
salt/config/__init__.py:3682:    for config_key in ("log_file", "key_logfile"):
salt/config/__init__.py:3886:    for config_key in ("log_file", "key_logfile", "ssh_log_file"):
doc/man/salt.7:16525:# key_logfile, pidfile, autosign_grains_dir:
doc/man/salt.7:17655:#key_logfile: /var/log/salt/key
doc/man/salt.7:18601:#key_logfile: /var/log/salt/key
doc/man/salt.7:19312:#key_logfile: /var/log/salt/key
conf/suse/master:40:# key_logfile, pidfile, autosign_grains_dir:
conf/suse/master:1076:#key_logfile: /var/log/salt/key
conf/minion:777:#key_logfile: /var/log/salt/key
conf/master:42:# key_logfile, pidfile, autosign_grains_dir:
conf/master:1172:#key_logfile: /var/log/salt/key
conf/proxy:542:#key_logfile: /var/log/salt/key
tests/unit/test_config.py:255:            wfh.write("root_dir: /\n" "key_logfile: key\n")
tests/unit/test_config.py:262:            wfh.write("root_dir: /\n" "key_logfile: key\n")
tests/unit/test_config.py:268:        temp_config = "root_dir: /\n" "key_logfile: key\n"
tests/unit/test_config.py:270:            temp_config = "root_dir: c:\\\n" "key_logfile: key\n"
tests/unit/test_config.py:282:        self.assertEqual(config["key_logfile"], expect_path_join)
tests/unit/test_config.py:284:        self.assertNotEqual(config["key_logfile"], expect_sep_join)
tests/unit/utils/test_parsers.py:569:        if log_file_name == "key_logfile":
tests/unit/utils/test_parsers.py:815:        self.logfile_config_setting_name = "key_logfile"
tests/unit/utils/test_parsers.py:823:        self.key_logfile = "/tmp/key_logfile"
tests/unit/utils/test_parsers.py:872:            self.logfile_config_setting_name: "key_logfile",
tests/unit/utils/test_parsers.py:924:        if os.path.exists(self.key_logfile):
tests/unit/utils/test_parsers.py:925:            os.unlink(self.key_logfile)
tests/integration/files/conf/master:18:key_logfile: key.log

Start by reviewing salt/config/init.py and the listed key_logfile usages, then compare conf/master, conf/minion, and their corresponding .rst files. Check the configuration and parser tests to understand current support. Done means the project’s decision is documented consistently, with either updated configuration documentation or a complete deprecation path.