convert: allow core.autocrlf=input and core.eol=crlf

Even though the configuration parser errors out when core.autocrlf
is set to 'input' when core.eol is set to 'crlf', there is no need
to do so, because the core.autocrlf setting trumps core.eol.

Allow all combinations of core.crlf and core.eol and document
that core.autocrlf overrides core.eol.

Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -337,9 +337,9 @@ core.quotePath::
 
 core.eol::
 	Sets the line ending type to use in the working directory for
-	files that have the `text` property set.  Alternatives are
-	'lf', 'crlf' and 'native', which uses the platform's native
-	line ending.  The default value is `native`.  See
+	files that have the `text` property set when core.autocrlf is false.
+	Alternatives are 'lf', 'crlf' and 'native', which uses the platform's
+	native line ending.  The default value is `native`.  See
 	linkgit:gitattributes[5] for more information on end-of-line
 	conversion.
 

config.c

@@ -803,8 +803,6 @@ static int git_default_core_config(const char *var, const char *value)
 
 	if (!strcmp(var, "core.autocrlf")) {
 		if (value && !strcasecmp(value, "input")) {
-			if (core_eol == EOL_CRLF)
-				return error("core.autocrlf=input conflicts with core.eol=crlf");
 			auto_crlf = AUTO_CRLF_INPUT;
 			return 0;
 		}
@@ -830,8 +828,6 @@ static int git_default_core_config(const char *var, const char *value)
 			core_eol = EOL_NATIVE;
 		else
 			core_eol = EOL_UNSET;
-		if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
-			return error("core.autocrlf=input conflicts with core.eol=crlf");
 		return 0;
 	}