#2473 Filenames are disturbed while trying to list or decompress archive

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File and folder names are disturbed while trying to list archive contents or decompress it.

~/test_folder$ 7zz l ./Desktop.zip

7-Zip (z) 21.07 (x64) : Copyright (c) 1999-2021 Igor Pavlov : 2021-12-26
 64-bit locale=ru_RU.UTF-8 Threads:4

Scanning the drive for archives:
1 file, 330 bytes (1 KiB)

Listing archive: ./Desktop.zip

--
Path = ./Desktop.zip
Type = zip
Physical Size = 330

   Date      Time    Attr         Size   Compressed  Name
------------------- ----- ------------ ------------  ------------------------
2016-09-28 17:41:00 D....            0            0   
2016-09-28 17:40:41 ....A            4            4   ⥪⮢ 㬥.txt
------------------- ----- ------------ ------------  ------------------------
2016-09-28 17:41:00                  4            4  1 files, 1 folders

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Fixed some minor errors:
1) Avoid possible problems with table size calculation
2) Assume CP437 if charset detection fails

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Asked several friends to test on several systems including Arch.

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Removed code branch that was actually unused. All ANSI archives that I have either also have UnicodeName field or have OEM codepage in Central header what is used by 7-zip and ANSI only in Local header.

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Added -mcp option support

[Sam Tansy]

How to use this `-mcp'? Tried that, but got error:

$ 7zz x -mcpCP1251 Desktop.zip

Extracting archive: Desktop.zip
ERROR: Desktop.zip
Cannot open the file as archive

E_INVALIDARG : One or more arguments are invalid

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7zz -mcp=866 l ./zip.zip
7zz -mcp=1251 l ./zip.zip

etc

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Bring back fix for
https://sourceforge.net/p/sevenzip/bugs/1060/

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https://github.com/ip7z/7zip/pull/36