CONV_JISX0201KANA:TRUE in lynx.cfg (Shift_JIS html)
display_charset=EUC-JP (expected):

display_charset=UTF-8 without patch (actual):

display_charset=UTF-8 with patch:
CONV_JISX0201KANA:FALSE in lynx.cfg (Shift_JIS html)
display_charset=EUC-JP:

display_charset=UTF-8 without patch (same as CONV_JISX0201KANA:TRUE):

display_charset=UTF-8 with patch:
EUC-JP html
display_charset=UTF-8 without patch:

display_charset=UTF-8 with patch: