fpart/utils.c: Fix incorrect use of optarg
file_entry.c: Fix incorrect path lookups when generating parent dirs
fpart.c: Remove useless bzero(3) calls
fpart.c: Fix file closure
file_entry.c: Get rid of useless variable (input_path_len)
file_entry.c: Make fallthrough explicit
file_entry: Use _exit(2) in signal handler
Doc: Update Huawei links