message: [Build] Bump master to 3.2.99 (non-release)
  Now that 3.2 has been branched off, the `master` branch can be bumped up
  to the 3.2.99 "dummy" version specifier, ie pre-3.3.
diff: dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
  AC_PREREQ([2.60])
  define(_CLIENT_VERSION_MAJOR, 3)
  -define(_CLIENT_VERSION_MINOR, 1)
  +define(_CLIENT_VERSION_MINOR, 2)
  define(_CLIENT_VERSION_REVISION, 99)
  define(_CLIENT_VERSION_BUILD, 0)
  define(_CLIENT_VERSION_IS_RELEASE, false)
  