INPUTMOUNITS is now eV/c instead of eV

As pointed out by Hui Zhang, when we updated the momentum conversion formula in #475 (closed), the input units for momentum became [eV/c] instead of [eV].

Accordingly, the command for changing units

INPUTMOUNITS=EV

should be changed to something like

INPUTMOUNITS=EV/c

And it should also be corrected in the manual in section 15.1

• Update code !490 (merged)
• Update documentation OPAL/documentation/manual!126
• Update regression tests regression-tests!29 (merged)