patch 8.1.0111: .po files do not use recommended names

Problem:    .po files do not use recommended names.
Solution:   Give a warning if the recommended name is not used.  Accept the
            recommended name for conversion. (Christian Brabandt, Ken Takata)

src/po/Makefile

@@ -87,7 +87,7 @@ sjiscorr: sjiscorr.c

ja.euc-jp.po: ja.po
	iconv -f utf-8 -t euc-jp ja.po | \
		sed -e 's/charset=utf-8/charset=euc-jp/' -e 's/# Original translations/# Generated from ja.po, DO NOT EDIT/' > ja.euc-jp.po
		sed -e 's/charset=[uU][tT][fF]-8/charset=euc-jp/' -e 's/# Original translations/# Generated from ja.po, DO NOT EDIT/' > ja.euc-jp.po

# Convert cs.po to create cs.cp1250.po.
cs.cp1250.po: cs.po
@@ -105,7 +105,7 @@ pl.cp1250.po: pl.po
pl.UTF-8.po: pl.po
	rm -f pl.UTF-8.po
	iconv -f iso-8859-2 -t utf-8 pl.po | \
		sed -e 's/charset=ISO-8859-2/charset=utf-8/' -e 's/# Original translations/# Generated from pl.po, DO NOT EDIT/' > pl.UTF-8.po
		sed -e 's/charset=ISO-8859-2/charset=UTF-8/' -e 's/# Original translations/# Generated from pl.po, DO NOT EDIT/' > pl.UTF-8.po

# Convert sk.po to create sk.cp1250.po.
sk.cp1250.po: sk.po
@@ -119,7 +119,7 @@ sk.cp1250.po: sk.po
zh_CN.cp936.po: zh_CN.UTF-8.po
	rm -f zh_CN.cp936.po
	iconv -f UTF-8 -t cp936 zh_CN.UTF-8.po | \
		sed -e 's/charset=utf-8/charset=gbk/' -e 's/# Original translations/# Generated from zh_CN.UTF-8.po, DO NOT EDIT/' > zh_CN.cp936.po
		sed -e 's/charset=[uU][tT][fF]-8/charset=gbk/' -e 's/# Original translations/# Generated from zh_CN.UTF-8.po, DO NOT EDIT/' > zh_CN.cp936.po

# Convert ko.UTF-8.po to create ko.po.
ko.po: ko.UTF-8.po

src/po/check.vim

@@ -173,12 +173,37 @@ elseif !plural && search('^"Plural-Forms: ', 'n')
  " We allow for a stray plural header, msginit adds one.
endif

" Check that 8bit encoding is used instead of 8-bit
let cte = search('^"Content-Transfer-Encoding:\s\+8-bit', 'n')
let ctc = search('^"Content-Type:.*;\s\+\<charset=[iI][sS][oO]_', 'n')
let ctu = search('^"Content-Type:.*;\s\+\<charset=utf-8', 'n')
if cte
  echomsg "Content-Transfer-Encoding should be 8bit instead of 8-bit"
  " TODO: make this an error
  " if error == 0
  "   let error = cte
  " endif
elseif ctc
  echomsg "Content-Type charset should be 'ISO-...' instead of 'ISO_...'"
  " TODO: make this an error
  " if error == 0
  "   let error = ct
  " endif
elseif ctu
  echomsg "Content-Type charset should be 'UTF-8' instead of 'utf-8'"
  " TODO: make this an error
  " if error == 0
  "   let error = ct
  " endif
endif


if error == 0
  " If all was OK restore the view.
  call winrestview(wsv)
  echomsg "OK"
else
  " Put the cursor on the line with the error.
  exe error
endif

src/po/sjiscorr.c

@@ -16,7 +16,8 @@ main(int argc, char **argv)
	{
		for (p = buffer; *p != 0; p++)
		{
			if (strncmp(p, "charset=utf-8", 13) == 0)
			if (strncmp(p, "charset=utf-8", 13) == 0
				|| strncmp(p, "charset=UTF-8", 13) == 0)
			{
				fputs("charset=cp932", stdout);
				p += 12;

src/version.c

@@ -789,6 +789,8 @@ static char *(features[]) =

static int included_patches[] =
{   /* Add new patch number below this line */
/**/
    111,
/**/
    110,
/**/