Fix header includes to be a bit more consistent

src/input/input_buffer.cpp

@@ -1,11 +1,10 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 
-#include <cerrno>
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
-#include <iostream>
+#include <sstream>
 #include <mist/bitfields.h>
 #include <mist/defines.h>
 #include <mist/langcodes.h>

src/input/input_hls.cpp

@@ -19,7 +19,6 @@
 #include <mist/ts_packet.h>
 #include <string>
 #include <sys/stat.h>
-#include <vector>
 
 #define SEM_TS_CLAIM "/MstTSIN%s"
 

src/input/input_hls.h

@@ -1,13 +1,10 @@
 #pragma once
 #include "input.h"
-#include <fstream>
 #include <mist/dtsc.h>
 #include <mist/nal.h>
 #include <mist/ts_packet.h>
 #include <mist/ts_stream.h>
-#include <set>
 #include <string>
-#include <vector>
 //#include <stdint.h>
 #include <mist/http_parser.h>
 #include <mist/urireader.h>