Create an in-memory configuration backend from a string in standard
git configuration file format.
int git_config_backend_from_string(git_config_backend **out, const char *cfg, size_t len, git_config_backend_memory_options *opts);
const char *
In
cfg
the configuration that is to be parsed
size_t
In
len
the length of the string pointed to by cfg
In
opts
the options to initialize this backend with, or NULL
