Use uri_has_scheme for Webdav response href

Use uri_has_scheme to find out if the href in Webdav responses is absolute
to use the matching base path extraction.

Signed-off-by: Vincent Petry <PVince81@yahoo.fr>

src/util/UriExtract.cxx

@@ -85,7 +85,7 @@ uri_after_scheme(std::string_view uri) noexcept
 }
 
 bool
-uri_has_scheme(const char *uri) noexcept
+uri_has_scheme(std::string_view uri) noexcept
 {
 	return !uri_get_scheme(uri).empty();
 }

src/util/UriExtract.hxx

@@ -40,7 +40,7 @@
  */
 gcc_pure
 bool
-uri_has_scheme(const char *uri) noexcept;
+uri_has_scheme(std::string_view uri) noexcept;
 
 /**
  * Returns the scheme name of the specified URI, or an empty string.