first steps with command line args

test/t1.log

@@ -0,0 +1,10 @@
+testfunc() works!
+    ### main.sh
+usage: ./run.sh options
+       -a, --auto      start nightly backup
+       -l, --list      list archives
+       -c, --content <archive> 
+                       show contents of archive
+       -r, --restore <archive> <file(s)> 
+                       restore files from archive to pwd
+       -h, -?. --help  show this help