playlist/cue: support file type declaration "FLAC" (non-standard)

According to http://wiki.hydrogenaud.io/index.php?title=Cue_sheet FLAC files should use the "WAVE" file type, but I recently encountered CUE files declared as "FLAC" which could not be read by MPD.

playlist/cue: support file type declaration "FLAC" (non-standard)
fcf487f4 · Max Kellermann · 90697297 · fcf487f4 · fcf487f4
Commit fcf487f4 authored Aug 11, 2018 by Max Kellermann
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NEWS NEWS +2 -0

CueParser.cxx src/playlist/cue/CueParser.cxx +1 -0

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--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,8 @@ ver 0.20.21 (not yet released)
  - simple: allow .mpdignore comments only at start of line
 * output
  - httpd: remove broken DLNA support code
+* playlist
+  - cue: support file type declaration "FLAC" (non-standard)
 * URI schemes are case insensitive

 ver 0.20.20 (2018/05/22)

--- a/src/playlist/cue/CueParser.cxx
+++ b/src/playlist/cue/CueParser.cxx
@@ -202,6 +202,7 @@ CueParser::Feed2(char *p) noexcept
 			return;

 		if (strcmp(type, "WAVE") != 0 &&
+		    strcmp(type, "FLAC") != 0 && /* non-standard */
 		    strcmp(type, "MP3") != 0 &&
 		    strcmp(type, "AIFF") != 0) {
 			state = IGNORE_FILE;