Change argument parsing to use optparse, fix bugs in it, misc. changes

- Change argument parsing library from xgetopt to optparse (pretty close to a
drop-in replacement).

- Fix bugs in the argument parsing. There were several.

- Remove an extraneous printf added for debugging purposes.

- Add more bounds checks for numeric arguments to avoid passing garbage to the
library code and hitting assertions when the input is bad.

- Change the clang-format invocation in the Makefile to have --verbose.

- Change -Wpedantic to --pedantic-errors in CFLAGS, add -Wno-unused-function
so it doesn't complain about the ones from optparse (such are the perils of
single-header libraries).

1 files changed, 0 insertions, 0 deletions

diff --git a/getopt b/getopt
deleted file mode 160000
-Subproject 55d8fefe680d9b7e68ab80eb46e1bd4ad324fc2