Read the file /etc/group and store the resulting fields in an internal global array variable.
Only the first call to this function will actually read the file, unless
mbfl_system_group_reset()
has been called.
Reset the internal state so that the next call to mbfl_system_group_read()
will actually load,
or reaload, the contents of /etc/group.
This document describes version 3.0.0-devel.9 of Marcos Bash Functions Library.