More canonicalization fixes

I just applied this new version of canonicalize_path():
	
	/*
	 * Make all paths look like Unix
	 */
	void
	canonicalize_path(char *path)
	{
	#ifdef WIN32
	    /*
	     * The Windows command processor will accept suitably quoted paths
	     * with forward slashes, but barfs badly with mixed forward and back
	     * slashes.
	     */
	    char       *p;
	
	    for (p = path; *p; p++)
	    {
	        if (*p == '\\')
	            *p = '/';
	    }

	    /*  In Win32, if you do:
	     *      prog.exe "a b" "\c\d\"
	     *  the system will pass \c\d" as argv[2].
	     */
	    if (p > path && *(p-1) == '"')
	        *(p-1) = '/';
	#endif
	
	    /*
	     *  Removing the trailing slash on a path means we never get
	     *  ugly double slashes.  Don't remove a leading slash, though.
	     *  Also, Win32 can't stat() a directory with a trailing slash.
	     */
	    trim_trailing_separator(path);
	}

The new thing Magnus found was this in Win32:

	prog.exe "a b" "\c\d\"

returns \c\d" as argv[2]

Quite amazing. The fix on Win32 is to convert a trailing double-quote to
a slash.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  [email protected]               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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