scylla_util.py::sysconfig_parser: introduce has_option()
scylla_util.py::sysconfig_parser: introduce has_option()

has_option() returns TRUE if a given configuration option is set.

Signed-off-by: Vlad Zolotarov <976c0f8d0852ed6439ad273880b400a75a7c41d0@scylladb.com>

avikivity/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla