In a few places `malloc` was being used without checking the return for
a `NULL` pointer. There's already a wrapper (`ss_malloc`) in
`util.c` that performs this check and exits if it fails so this commit
replaces the unsafe `malloc`s with `ss_malloc`s.
Two functions `construct_udprealy_header` and `parse_udprealy_header`
contained typos and should be `construct_udprelay_header` and
`parse_udprelay_header` respectively. This commit updates these function
names and the respective callers.
This commit changes the "method" parameter in the debian/config.json
from "rc4-md5" to "chacha20-ietf-poly1305". rc4-md5 is unsafe and
there is support for a better AEAD ciphersuite.
Daniel