Update net/socat to socat-1.7.3.2

pkgsrc changes:
- Take MAINTAINERship

Changes:
1.7.3.2
-------
corrections:
- SIGSEGV and other signals could lead to a 100% CPU loop
- Failing name resolution could lead to SIGSEGV
  Thanks to Max for reporting this issue.
- Include <stddef.h> for ptrdiff_t
  Thanks to Jeroen Roovers for reporting this issue.
- Building with --disable-sycls failed due to missing sslcls.h defines
  Socat hung when configured with --disable-sycls.
- Some minor corrections with includes etc.
- Option so-reuseport did not work. Thanks to Some Raghavendra Prabhu
  for sending a patch.
- Programs invoked with EXEC, nofork, and -u or -U had stdin and stdout
  incorrectly assigned
  Test: EXEC_NOFORK_UNIDIR
  Thanks to David Reiss for reporting this problem.
- Socat exited with status 0 even when a program invoked with SYSTEM or
  EXEC failed.
  Tests: SYSTEM_RC EXEC_RC
  Issue reported by Felix Winkelmann.
- AddressSanitizer reported a few buffer overflows (false positives).
  Nevertheless fixed Socat source.
  Issue reported by Hanno B旦ck.
- Socat did not use option ipv6-join-group.
  Test: USE_IPV6_JOIN_GROUP
  Thanks to Linux L�ssing for sending a patch.
- UDP-LISTEN did not honor the max-children option.
  Test: UDP4MAXCHILDREN UDP6MAXCHILDREN
  Thanks to Leander Berwers for reporting this issue.
- Options so-rcvtimeo and so-sndtimeo do not work with poll()/select()
  and therefore were useless.
  Thanks to Steve Borenstein for reporting this issue.
- Option dhparam was documented as dhparams. Added the alias name
  dhparams to fix this.
  Thanks to Alexander Neumann for sending a patch.
- Options shut-down and shut-close did not work.
  Thanks to Stefan Schimanski for providing a patch.
- There was a bug in printing readline log message caused by a misleading
  indentation.
  Thanks to Paul Wouters for reporting.
- The internal vsnprintf_r function looped or crashed on size parameter
  with hexadecimal output.
- Ignore exit code of child process when it was killed by master due to
  EOF
- Corrected byte order on read of IPV6_TCLASS value from ancillary
  message
- Fixed type of the bool element in options. This had bug caused failures
  e.g. of ignoreeof on big-endian systems when bool was not based on int.
- On systems with predefined bool type whose size differs from int some
  IPv6 and TCP options (per setsockopt()) failed.
- Length of integral data in ancillary messages varies (TOS: 1 byte,
  TTL: 4 bytes), the old implementation failed for TTL on big-endian
  hosts.
- Fixed an issue in options processing: TUN and DNS flags had failed on
  big-endian systems and the NO- forms had probable never worked.

porting:
- Type conflict between int and sig_atomic_t between declaration and
  definition of diag_immediate_type and diag_immediate_exit broke
  compilation on FreeBSD 10.1 with clang. Thanks to Emanuel Haupt for
  reporting this bug.
- Socat failed to compile on platforms with OpenSSL without
  DTLSv1_client_method or DTLSv1_server_method.
  Thanks to Simon Matter for sending a patch.
- NuttX OS headers do not provide struct ip, thus socat did not compile.
  Made struct ip subject to configure.
  Thanks to SP for reporting this issue.
- Socat failed to compile with OpenSSL version 1.0.2d where
  SSLv3_server_method and SSLv3_client_method are no longer defined.
  Thanks to Mischa ter Smitten for reporting this issue and providing
  a patch.
- configure checked for OpenSSL EC_KEY assuming it is a define but it
  is a type, thus OpenSSL ECDHE ciphers failed even on Linux.
  Thanks to Andrey Arapov for reporting this bug.
- Changes to make socat compile with OpenSSL 1.1.
  Thanks to Sebastian Andrzej Siewior e.a. from the Debian team for
  providing the base patch.
  Debian Bug#828550
- Make Socat compatible with BoringSSL.
  Thanks to Matt Braithwaite for providing a patch.
- OpenSSL: Use RAND_status to determine PRNG state
  Thanks to Adam Langley for providing a patch
- AIX-7 uses an extended O_ACCMODE that does not fit socat's internal
  requirements. Thanks to Garrick Trowsdale for providing a patch
- LibreSSL support: check for OPENSSL_NO_COMP
  Thanks to Bernard Spil for providing a patch

testing:
- socks4echo.sh and socks4a-echo.sh hung with new bash with read -n
- test.sh: stderr; option -v (verbose); FDOUT_ERROR description
- improved proxy.sh - it now also takes hostnames
- A few corrections in test.sh
- DTLS1 test hangs on some distributions. Test is now only performed
  with OpenSSL 1.0.2 or higher.
- More corrections to test.sh that reveal a mistake with IPV6_TCLASS

docu:
- Corrected source of socat man page to correctly show man references
  like socket(2); removed obseolete entries from See Also
- Docu and some comments mentioned addresses SSL-LISTEN and SSL-CONNECT
  that do not exist (OPENSSL-LISTEN, SSL-L; and OPENNSSL-CONNECT, SSL
  are correct).
  Thanks to Zhigang Wang for reporting this issue.
- Fixed a couple of English spelling and grammar mistakes.
  Thanks to Jakub Wild for sending the patches.
- NOEXPAND() was not resolved 2 times.
- More minor docu corrections

legal:
- Added contributors to copyright notices. Suggested by Matt Braithwaite.

(leot)