outcommented this case.
Big improvement, q expansion works now up to 1e0 and further.
Test case sym::Cone6 split in two.
qpalim 1.2e-2, qlim 1e-2 => sym<1.6e-11, spec<8e-13, cont 4.87e-11 @ shape9, qpa

improved sum over edges in q expansion.

continuity test requires revert of q_lim from 1e-4 to 1e-5; this requires relaxation of symmetry tests

improved termination criterion for qpa expansion, improves worst-cast continuity by factor 2, and allows increase of qpa_limit