Merge commit '7087c8de43b0d5d27c52da6ba2ba4957b7e336ff' into new_merge

Import libxo-1.4.0:

- Two changes to encoder options:
encoder options may use plus or colon, but only one
encoder names can be specified as "@name"
This results in the syntax:

df --libxo @csv:no-header:leafs=name.available-blocks /

- If xo_set_program is called before xo_parse_args, honor the requested value
- add xo_errorn* function; repair newline-adding-on-xo_error bug
- test programs now use fixed name, since linux libtool prefixs "lt-"
- Fix "horse butt" comment in source code
- update test cases

PR: 242686

Import libxo-1.3.0:
- move from "oxtradoc" to RST/Sphinx documentation
- new "csv" encoder, which allows path and leaf lists
- address warnings from PVS-Stdio tool
- add "xolint" detected errors to the documentation

Import libxo-0.8.0:
- addition of --libxo colors=xxxxx color map (so I never see "blue")
- fix bugs from -fsanitize=address and =undefined
- utf-8 changes (remove support fore 6 byte utf-8 values, which are "historical")
- add comments
- fix man pages
- update test cases

Submitted by: phil
Reviewed by: sjg
Approved by: sjg (mentor)

Import libxo-0.7.2; add xo_options.7.

Submitted by: phil
Reviewed by: sjg
Approved by: sjg (mentor)

Submitted by: phil
Reviewed by: sjg (mentor)
Approved by: sjg

Upgrade libxo to 0.4.5.

Local changes incorporated by 0.4.5: r284340
Local changes retained: r276260, r282117

Obtained from: https://github.com/Juniper/libxo

Upgrade libxo to 0.4.5.

Local changes incorporated by 0.4.5: r284340
Local changes retained: r276260, r282117

Obtained from: https://github.com/Juniper/libxo