Fixed ob_gzhandler with register_long_arrays = On.
Unified compression_coding global var (removed ob_gzip_coding).
Switched to zend_parse_parameters().
Added some tests.
(gzencode(string data [, int level [, int encoding_mode]])),
should fix#15930.
@- The second parameter of gzencode() now is the compression level like
@ in the documentation. The encoding mode is a third (optional) parameter.
# Rework of gzencode(), output should be closer to real gzip output.
# I think in the old version there could be some problems with
# this function and output compression, should be fixed, too.
Fixed prototype and added test for #14939.
# We have extra \0 if the input comes directly from gzdeflate()
# so give one extra byte as length to workaround behaviour of zlib.
# I want to avoid copying the input, but if there are problems,
# please tell (see my message <20020310175611.GA4472@stefan.roehri.ch> to
# php-dev).
