* Version 3.0Summary of user-visible changes since 2.0:** Bug fixes and improved stability.** Long options work on all platforms.   The GNU libc getopt_long() functions were copied into the httptunnel   distribution and is used on systems where no long options are available   in the standard libraries.** Logging messages get a time stamp.** httptunnel is now Debianized.** Replaced the MANUAL file with two man pages.** Made compatible with the Univeral TUN device driver.** New --strict-content-length option.   This option makes httptunnel obey the Content-Length field in the   HTTP header.  This improves compatibility with some proxies.  The   defalt is to be sloppy about the Content-Length field.** New --keep-alive option.   With this option, httptunnel will send keep-alive bytes, which   improves stability with some proxies.  The defailt is to send   keep-alive bytes every five seconds.** New --max-connection-age option.   This option specifies the maximum age of any HTTP connection made   by httptunnel.  The default is 300 seconds.** New --proxy-authorization option.   This option is used to send a authorization string to the proxy.** New --proxy-authorization-file option.   This option works as --proxy-authorization, only it reads the   string from the specified file.** New --pid-file option.   With this option, httptunnel will write its process identification   number to the specified file.** New --user-agent option.   Use this option to specify a string for the User-Agent field sent   in HTTP headers.  This is useful for proxies that want a specific   value there.* Version 2.0Summary of user-visible changes since 1.0:** There is a FAQ.** There is a MANUAL which isn't.** Port numbers have default values.** There is a debug mode.   Using --enable-debug with 'configure' will make htc and hts recognize   --debug and --logfile options.** Uses syslog.   When not in debug mode, important events and unexpected errors   are logged using LOG_NOTICE and LOG_ERROR, respectively.** hts takes a --content-length option.   It works like the one for htc.** Short option for --forward-port changed from -f to -F.** Improved portability.   Works on at least some versions of GNU/Linux, Solaris, AIX,   Digital UNIX, Cygwin, FreeBSD, OpenBSD.** Improved protocol and HTTP handling.   Resulting in better stability.** Bug fixes.** Bug reports should now go to bug-httptunnel@nocrew.org.* Version 1.103** Bug reporting email addres changed to bug-httptunnel@gnu.org.** Miscellaneous cosmetic stuff.* Version 1.102** Emulate endprotoent() if not present.** Changed email addresses to preferred ones.** Handle setsockopt() errors slightly more gracefully.* Version 1.101** Disabled compilation of tt and rw, as they are hardly needed anymore.** Changed internal parameters once again.   Send keep-alive bytes ever 5 seconds.   Maximum connection time back to 5 minutes.** Improved logging.   Write package name, package version and debug level to log.   Removed one superfluous level of indentation.** Removed a problem which caused a busy loop.   This only happened when --proxy-buffer-* was active.* Version 1.100** Removed an attempt to printf() NULL, which caused a crash on Solaris.   Thanks to Tomas Berndtsson <tomas@nocrew.org> for the fix.** Hopefully the setsockopt() errors will be gone.** Changed some internal parameters to satisfy really picky proxies.   Increased frequency of keep-alive bytes from 1/30s to 1/10s.   Decreased maximum connection time from 5 minutes to 1 minute.   TODO: user interface for these parameters.* Version 1.99** Added plea for post cards to README.   The greedy author tries to turn this otherwise perfectly free   software into a vehicle for extracting post cards from innocent   users.** Fixed --enable-debug without --debug bug.** Adjusted debugging levels.   0 now means no debugging messages, 5 is the highest level.* Version 1.98** Close a HTTP POST connection after 5 minutes.   This is a kludge, but finally no data is lost with Squid 2.** httptunnel is now GNU software.** Changed the short option for --forward-port from -f to -F.   Because I want to use -f for a future --file option.** Removed some possible buffer overflows.* Version 1.97** Improved poll() emulation.** Improved HTTP request and response parsing.** hts --content-length works now.   Thanks Philip!** Try some setsockopt() settings to make connections more reliable.* Version 1.96** Changed compiler warnings when --enable-debug.** Included the HTTP RFCs in the distribution.** Emulate poll() using select() on systems without poll().   Still untested, though.** Fixed void * arithmetic and a prototype/definition mismatch.   Thanks to Larry Gensch for this patch!* Version 1.95** I/O byte counters.   --debug 3 will show byte counters for the data sent and recieived.   --debug 4 will also show byte counters for the raw protocol data   sent and received.** hts takes a --content-length switch.** Make sure HTTP GET responses are not cached.   Added "Expires: 0" (invalid HTTP, I know) and "Cache-Control:   no-store, must-revalidate" to HTTP GET response header.* Version 1.94** Avoid a few compilation warnings.** http.h didn't make it into the distribution.* Version 1.93** Parse HTTP GET responses.   If the version is unknown or the status code signals an error, fail.* Version 1.92** Forgot to regenerate configure, Makefile, etc.* Version 1.91** Forgot to update NEWS before releasing 1.90.* Version 1.90** More robust.** Major protocol change.   Now uses the protocol for HTTP GET requests too.** Improved error logging.** Solaris and AIX fixes.   Thanks to Andrew Gray for the patch.** Send keep-alive bytes every 30 seconds of inactivity.* Version 1.5** New --logfile switch.** Uses syslog.* Version 1.4** Works with Squid 2.** Solaris fixed.   And this time, they're actually tested!  Thanks to Tomas Berndtsson   for supplying these fixes.* Version 1.3** Fixes for addr_inet() and systems without getopt_long().   Thanks to sgback@nety.yeungnam.ac.kr for the bug report.* Version 1.2** 'configure' checks whether socklen_t is declared or not.   This should make httptunnel compile on older libc's.   Thanks to Tomas Almlof and J A for reporting this bug.** Not specifying a proxy doesn't give a usage error any more.   Thanks to George Bonser for reporting this bug.* Version 1.1** 'configure' takes a --enable-debug switch.   Use it to enable debugging code.** 'htc' and 'hts' take a --debug switch.   Use it to enable debugging mode.** Some arguments on the command line of 'hts' and 'htc' don't need to   be specified with port numbers.   If unspecified, a default port number is used.  Use --help to see   where this applies.** Removed annoying buffering bug.   So no fake --proxy-buffer-size and --proxy-buffer-timeout is needed   any more.* Version 1.0** First public release.