Merge branch 'next'

* next: (25 commits)
  chore, adapt libunserding version
  chore, kick example lua file, no longer supported without unserdingd
  major, kick cli/ directory
  chore, eradicate tcp/unix/dccp code
  chore, kick configuration submodule (lua-config.* and unserding-cfg.h)
  chore, add -lrt to ud-ping's LDFLAGS
  fix, PEBKAC, use libev_{CFLAGS,LIBS} in Makefile.am
  chore, follow-up, don't error on undefined HAVE_GETADDRINFO
  major, eradicate the whole cli/ directory
  chore, move ud-ping from cli/ -> src/
  chore, kick pthread specifiers from AM_CFLAGS and AM_LDFLAGS
  chore, cosmetics, clean up Makefile.am
  major, refrain from building unserdingd
  chore, eradicate asn1-instr-example.xml, we've got fixml (and libfixc) for that
  major, kick unsercli
  minor, kick summary and conditionals to determine what to build
  minor, kick lua checks and readline/libedit checks
  chore, kick parser/lexer check (and macro file)
  chore, kick all input/output/socket checks
  minor, check for libtool after all AC_LINK_IFELSE()s
  ...