Get the value of a path config variable.
A leading '~' will be expanded to the global search path (which
defaults to the user's home directory but can be overridden via
git_libgit2_opts()
.
All config files will be looked into, in the order of their defined level. A higher level means a higher priority. The first occurrence of the variable will be returned here.
the variable's name
0 or an error code