[PROJ] cs2cs options

[Antonio Valanzano]

I have used for the first time cs2cs and I have found not easy to
discover which transformation the sw uses for the calculations.

Here are my questions:

1. Is it possible  for cs2cs to output not only the results but also
the EPSG code of the transformation(s)  used to produce the output ?
This information could be useful for users in order to have more
control over the transformations and avoid using the sw as a black
box.

2. Is it possible to specify, as an option of cs2cs, a particular
pipeline of transformations using the codes considered in the
Geographic Parameter of the EPSG ?

Antonio