Bugs fixed
^^^^^^^^^^

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Fixed exported libgromacs CMake target
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Update the exported libgromacs CMake target to not depend on non-
existing include paths and add GMX_DOUBLE define to interface
definitions. The target now gets exported into the Gromacs namespace.

:issue:`3468`

Fixed unsolicited changing of atom names in pdb file
""""""""""""""""""""""""""""""""""""""""""""""""""""

Remove functions to change atoms names when reading 
and writing pdb files. This affected naming of
H atoms in particular.

:issue:`3469`

Corrected AWH initial histogram size
""""""""""""""""""""""""""""""""""""

The initial histogram size for AWH biases depended (weakly) on the force
constant. This dependence has been removed, which increases the histogram
size by a about a factor of 3. In practice this has only a minor effect
on the time to solution. For multiple dimensions, the histogram size was
underestimated, in particular with a combination of slower and faster
dimensions. The, now simplified, formula for the initial histogram size is
given in the reference manual.

:issue:`3751`