Merge branch 'next'

* next: (49 commits)
  Revert "hack, use V=1 building on travis platform"
  chore, don't install stuff we don't need for travis CI build
  chore, enable server only if onion_LIBS are set
  fix, PEBKAC, use AM_LDFLAGS (typo)
  hack, use V=1 building on travis platform
  chore, don't trigger clang builds as clang doesn't support nested functions
  chore, link with -lonion, not statically
  chore, PEBKAC, list nifty.h as gandalfd source
  chore, onion with gnutls needs -lrt, add to onion_LIBS
  chore, move call of SXE_CHECK_LIBTOOL down
  fix, CMake-idiocy, provide onion_CFLAGS/_LIBS AC_ARG_VARs directly, the cmake macro is broken
  chore, update sxe-libtool m4 macro package
  chore, hardcode onion linker and compile flags
  minor, use CMAKE_FIND_PACKAGE to find libonion
  chore, kick sxe-aux.m4, do Werror handling ourself
  chore, don't check libev availability during configure
  chore, don't check for gperf at configure time
  chore, kick SXE_CHECK_LDFLAGS call from c.ac, we don't need massaging the special linker
  chore, PEBKAC, list gandalfd ggo gen'd files as BUILT_SOURCES
  chore, hack, use deb/deb-src directly as launchpad doesn't do natty packages anymore
  ...