Update to 0.35.0

  Add the following new features: arc4random, bswap, dprintf, efun,
  errc, fparseln, fts, posix_getopt, raise_default_signals,
  reallocarray, strsep and vis.
  See mk-configure.7 for details.

  Fixes:
    * mkc_check_decl: fix "prototype" mode. Extraction of function name
      was incorrect.  Add one more regression test for this case in
      tests/os_NetBSD.
    * Avoid multiple repetition of MKC_COMMON_DEFINES in CPPFLAGS
    * Fix target "depend" that failed if SRCS contains full path to
      source code.

  Move -Wreturn-type from CFLAGS.warns.{clang,gcc}.2 to
  CFLAGS.warns.{clang,gcc}.1 and make it an error for C++

  CC_TYPE and CXX_TYPE are correctly set if MKC_CHECK_CUSTOM is set.

  Use .error bmake command for checking MKC_REQD.  Also, move
  appropriate check to mkc_imp.preinit.mk, so it is checked in the
  very beginning.  Documentation and error message are slightly
  updated.

  Rename variable DISTCLEANFILES to CLEANDIRFILES, DISTCLEANFILES is
  considered deprecated.

  Rename variable DISTCLEANDIRS to CLEANDIRDIRS, DISTCLEANDIRS is
  considered deprecated.

  Add support for latest Intel C/C++ compiler.  We have to always add
  -we10006 option to it in order it fail when invalid option is used.

  Adapt some features for using functions implementation from
  libnbcompat and libbsd libraries.

  Use .depend_${.CURDIR:T} instead .depend to support MAKEOBJDIR.

  New tests and examples.


(cheusov)