Fix build.

Sponsored by: The FreeBSD Foundation

MfH @r295202

Expect to see panics in routing code at least now.

First pass to fix the 'tests' packages.

Sponsored by: The FreeBSD Foundation

MFH

Sponsored by: The FreeBSD Foundation

Merge ^/head r294169 through r294598.

sh: Clean a readonly local, even if the variable does not exist outside.

If a local variable has been made read-only, this should not prevent its
removal when the function returns.

sh: Add already working test for local-readonly interaction.

MFH @r294567

MFH

Sponsored by: The FreeBSD Foundation

Merge ^/head r293430 through r293685.

sh: Update associated state when restoring locals while leaving a function.

Some variables like PATH call a function when modified. Make sure to call
this also when leaving a function where such a v

sh: Update associated state when restoring locals while leaving a function.

Some variables like PATH call a function when modified. Make sure to call
this also when leaving a function where such a variable was made local.

Make sure to restore local variables before shellparam, so getopts state is
not clobbered.

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Merge ^/head r293280 through r293429.

sh: Add a test for 'cd -'.

Redirect 'cd -' output to /dev/null since POSIX requires it to write the new
directory name even if not interactive, but we currently only write it if
interactive.

sh: Ensure OPTIND=1 in subshell without forking does not affect outer env.

Command substitutions containing a single simple command and here-document
expansion are performed in a subshell environmen

sh: Ensure OPTIND=1 in subshell without forking does not affect outer env.

Command substitutions containing a single simple command and here-document
expansion are performed in a subshell environment, but may not fork. Any
modified state of the shell environment should be restored afterward.

The state that OPTIND=1 had been done was not saved and restored here.

Note that the other parts of shellparam need not be saved and restored,
since they are not modified in these situations (a fork is done before such
modifications).

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Merge ^/head r293036 through r293174.

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

sh: Link tests/builtins/getopts9.0 to the build.

This was forgotten in r273700.

Merge from head

Sponsored by: Gandi.net

Merge from head

Finish merging from head, messed up in previous attempt

Merge r286744-r287584 from head.

Merge ^/head r286858 through r287489.

sh: Fix read with escaped IFS characters at the end.

Characters escaped with a backslash must be treated as if they were not in
IFS. This includes stripping trailing IFS characters.

sh: Fix out of bounds read when there is no ] after a [:class:].

The initial check for a matching ] was incorrect if a ] may be consumed by a
[:class:]. The subsequent loop assumed that there must b

sh: Fix out of bounds read when there is no ] after a [:class:].

The initial check for a matching ] was incorrect if a ] may be consumed by a
[:class:]. The subsequent loop assumed that there must be a ].

Remove the initial check and make the loop cope with a missing ].

Found with afl-fuzz.

MFC after: 1 week

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Merge from HEAD