Adding rate rule for O2 + vinyl = Alkyne + HO2 and O2 + secC-rad = diene +
HO2

The rate rule is derived from the estimate by Westbrook et al.
for C2H3 + O2 = C2H2 + HO2. This affects acetylene production
in many oxidation mechanism.

Also updating rate rule for O2 + allylic = diene + HO2
The estimate is based on secC-rad + O2 = Alkene + HO2 by accounting
for allylic stability (around + 7kcal/mol)