Merge branch 'jk/test-hashmap-updates'

Code clean-up. * jk/test-hashmap-updates: test-hashmap: use "unsigned int" for hash storage test-hashmap: simplify alloc_test_entry test-hashmap: use strbuf_getline rather than fgets test-hashmap: use xsnprintf rather than snprintf test-hashmap: check allocation computation for overflow test-hashmap: use ALLOC_ARRAY rather than bare malloc