+ re-intern strings of external formula results (tdf#101691) [Eike Rathke]
    + opencl: initialize command queue on demand (tdf#103204) [Tomaž Vajngerl]
    + opencl: don't initialize OpenCL when disabled (tdf#103395) [Tomaž Vajngerl]
    + intern SharedString of cached external references result (tdf#85553) [Eike Rathke]
    + re-implement empty lockfile fix (tdf#92817) [Mike Kaganski]
    + avoid further crash with empty Chart document (tdf#94297) [Stephan Bergmann]
    + avoid crash with empty Chart document (tdf#94320) [Stephan Bergmann]