Function svn_config_get_server_setting 

pub unsafe extern "C" fn svn_config_get_server_setting(
    cfg: *mut svn_config_t,
    server_group: *const c_char,
    option_name: *const c_char,
    default_value: *const c_char,
) -> *const c_char

Retrieve value corresponding to @a option_name in @a cfg, or return @a default_value if none is found.

The config will first be checked for a default. If @a server_group is not @c NULL, the config will also be checked for an override in a server group,