Merge commit 'acb089b983171667467adc66f56a723b609ed22e' into kbsd/vis

Highlights:
- Some style fixes
- Bumped mbbuf in istrsenvisx() to MB_LEN_MAX to avoid VLAs
- mbslength cannot go negative, so ma

Merge commit 'acb089b983171667467adc66f56a723b609ed22e' into kbsd/vis

Highlights:
- Some style fixes
- Bumped mbbuf in istrsenvisx() to MB_LEN_MAX to avoid VLAs
- mbslength cannot go negative, so make it unsigned
- Further bounds checking & fix an additional overrun, with dlen == 0
- Avoid duplicate call to wcslen(start)

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Merge commit 'acb089b983171667467adc66f56a723b609ed22e' into kbsd/vis

Highlights:
- Some style fixes
- Bumped mbbuf in istrsenvisx() to MB_LEN_MAX to avoid VLAs
- mbslength cannot go negative, so ma

Merge commit 'acb089b983171667467adc66f56a723b609ed22e' into kbsd/vis

Highlights:
- Some style fixes
- Bumped mbbuf in istrsenvisx() to MB_LEN_MAX to avoid VLAs
- mbslength cannot go negative, so make it unsigned
- Further bounds checking & fix an additional overrun, with dlen == 0
- Avoid duplicate call to wcslen(start)

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Update vis(3) the latest from NetBSD.

This adds VIS_DQ for compatiblity with OpenBSD.

Correct by an off-by-one error and a read buffer overflow detected using
asan.

MFC after: 1 day

Update to a June 8th snapshot of (un)vis form NetBSD.

This adds stravis() and some new encoding flags VIS_SHELL, VIS_META,
and VIS_NOLOCALE.

Assorted cleanups and fixes includeing a manpage typo[0]

Update to a June 8th snapshot of (un)vis form NetBSD.

This adds stravis() and some new encoding flags VIS_SHELL, VIS_META,
and VIS_NOLOCALE.

Assorted cleanups and fixes includeing a manpage typo[0].

PR: 210013 [0]
Submitted by: pi [0]

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Update to the latest (un)vis(3) sources from NetBSD. This adds
multibyte support[0] and the new functions strenvisx and strsenvisx.

Add MLINKS for vis(3) functions add by this and the initial impor

Update to the latest (un)vis(3) sources from NetBSD. This adds
multibyte support[0] and the new functions strenvisx and strsenvisx.

Add MLINKS for vis(3) functions add by this and the initial import from
NetBSD[1].

PR: bin/166364, bin/175418
Submitted by: "J.R. Oldroyd" <fbsd@opal.com>[0]
stefanf[1]
Obtained from: NetBSD
MFC after: 2 weeks

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Replace our implementation of the vis(3) and unvis(3) APIs with
NetBSD's. This output size limited versions of vis and unvis functions
as well as a set of vis variants that allow arbitrary character

Replace our implementation of the vis(3) and unvis(3) APIs with
NetBSD's. This output size limited versions of vis and unvis functions
as well as a set of vis variants that allow arbitrary characters to be
specified for encoding.

Finally, MIME Quoted-Printable encoding as described in RFC 2045 is
supported.

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