lib/curl/Escape: add CurlUnescape()

src/lib/curl/Escape.cxx

@@ -53,3 +53,19 @@ CurlEscapeUriPath(StringView src) noexcept
 	CurlEasy easy;
 	return CurlEscapeUriPath(easy.Get(), src);
 }
+
+std::string
+CurlUnescape(CURL *curl, StringView src) noexcept
+{
+	int outlength;
+	CurlString tmp(curl_easy_unescape(curl, src.data, src.size,
+					  &outlength));
+	return std::string(tmp.c_str(), outlength);
+}
+
+std::string
+CurlUnescape(StringView src) noexcept
+{
+	CurlEasy easy;
+	return CurlUnescape(easy.Get(), src);
+}

src/lib/curl/Escape.hxx

@@ -42,4 +42,10 @@ CurlEscapeUriPath(CURL *curl, StringView src) noexcept;
 std::string
 CurlEscapeUriPath(StringView src) noexcept;
 
+std::string
+CurlUnescape(CURL *curl, StringView src) noexcept;
+
+std::string
+CurlUnescape(StringView src) noexcept;
+
 #endif