(posix_fileno) [_WIN32]: Rename posix_fileno() to fileno().

Remove the extern posix_fileno().

(fileno) [_WIN32]: Replace system fileno() with a function that supports posix
file descriptors.  Move #undef fileno to w32misc.h as the system define
is in stdio.h.

(rea) [_WIN32]: Add stdio.h for fileno() extern declaration and add misc.h
to ensure the WIN32 fixes to stdio.h are included.

src/lib/commands/rea.c

@@ -36,8 +36,10 @@
 #include <config.h>
 
 #include <ctype.h>
+#include <stdio.h>
 #include "commands.h"
 #include "match.h"
+#include "misc.h"
 #include "optlist.h"
 #include "tel.h"
 

src/lib/w32/posixio.c

@@ -129,7 +129,7 @@ set_fd(int fd, enum fdmap_io_type type, int handle)
     fdmap[fd].type = type;
 
     /*
-     * Garbage collection for posix_fileno(), currently not
+     * Garbage collection for fileno(), currently not
      * replacing fclose() and fcloseall() so do not know when
      * a stream is closed.
      */
@@ -586,7 +586,7 @@ writev(int fd, const struct iovec *iov, int iovcnt)
  * handle is reused.
  */
 int
-posix_fileno(FILE *stream)
+fileno(FILE *stream)
 {
     int fd;
     int handle;

src/lib/w32/unistd.h

@@ -36,7 +36,6 @@
 
 #include <io.h>
 #include <stdio.h>
-#undef fileno
 #include <direct.h>
 #include "sys/socket.h"
 #include <sys/stat.h>
@@ -108,8 +107,6 @@ typedef int socklen_t;
 #define read	posix_read
 #define write(fd, buffer, count) \
     posix_write((fd), (buffer), (count))
-#define fileno(stream) \
-    posix_fileno((stream))
 #define fsync(fd) \
     posix_fsync((fd))
 

src/lib/w32/w32misc.h

@@ -46,6 +46,7 @@
 /* stdio.h */
 #define vsnprintf _vsnprintf
 #define snprintf _snprintf
+#undef fileno
 
 /* stdlib.h */
 #define random rand