Fixed #46313 (Magic quotes broke $_FILES)

Fixed #46313 (Magic quotes broke $_FILES)
# magic_quotes_gpc was disabled during registration of $_FILES["x"]["tmp_name"]
# and $GLOBALS["x"] (which is tmp_name with register_globals enabled). This
# caused "x" to not be escaped so there was 2 different keys for the same file
# in $_FILES, one with tmp_name and the other without.
# All other variables (name, size, etc) are registered with magic_quotes_gpc
# untouched, both in $_FILES and $GLOBALS and I did not found a reason for
# disabling it for tmp_name.