import glob — there was no glob module

Found missing 2026-10-19 in sysdash's backend.py (cpu[0-9]*/cpufreq/scaling_cur_freq, hwmon*, temp*_label).

Fix: lib/rtl/mimic_glob.py, a plain-Python shim over os.listdir. It has glob, iglob (which returns a list), escape and has_magic, and supports fnmatch's * ? [seq] [!seq] with ranges and ** with recursive=True. Hidden names, a final ** that also yields files, and a pattern with no magic all behave as in CPython. root_dir=, dir_fd= and include_hidden= are not implemented. It has no fnmatch module of its own yet; the matcher lives inside glob.

Test: test/test_nilpy_glob_module.npy builds its own tree under /tmp.