The patch module has a few missing items, and inconsistencies, in its
documentation. A few of which are addressed here.
Within Ansible documentation, the choices for boolean values are
commonly 'yes', and 'no'. We standardise the options on that.
'remote_src' documentation uses 'False' and 'True' for its documentation,
so these have been updated in both the choices and default.
'src' documentation refers to 'remote_src', so is updated to use
the 'no' choice.
'backup' did not describe its options and default at all, so we add
them.
'binary' default used 'False', but specified the type as 'bool' which is
implicitly documented as 'yes'/'no', so we make that 'no' as well.
According the patch(1) manpage:
The --directory option change to the directory dir immediately, before
doing anything else.
Thus if file is not relative to dir and making file absolute ensure that
patch will find it.
