logging cleanups

* Moved all logging-related stuff into log.c
(and not myfprintf.c)

* ISO C90-compliant strftime usage:
%e and %R replaced with %d and %H:%M respectively

* Got rid of variadic macros since some old-school compilers
don't like them

* compiling with -DNDEBUG disables the DEBUG() macro

git-svn-id: https://svn.musicpd.org/mpd/trunk@4512 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/player.c

@@ -136,7 +136,7 @@ int playerInitReal()
 				pc->queueLockState = PLAYER_QUEUE_UNLOCKED;
 				pc->unlockQueue = 0;
 			} else if (pc->cycleLogFiles) {
-				myfprintfCloseAndOpenLogFile();
+				cycle_log_files();
 				pc->cycleLogFiles = 0;
 			} else
 				my_usleep(10000);