[build] Drop Dependency on Some Third Party Packages

[ppenna]

Context

We are using several third-party packages for performing trivial work and introducing dependencies for that reason is better to be avoided.

Proposed Solution

• We should drop the usage of the following crates:
• [ ] bit_iter
• [x] #469
• [ ] crc
• [ ] crossbeam_channel
• [x] #426
• [ ] eui48
• [x] #402
• [x] #425
• [x] #424

See Also

Issue #459, for a related Issue with crc.

[BrianZill]

crc looks to only be used currently in the generation of TCP initial sequence numbers (isn_generator.rs). The recommended procedure for generating secure ISNs can be found in RFC 6528, and typically involves a cryptographic hash function, which I'm pretty sure CRC doesn't qualify as, and also a temporally constant secret key, which the nonce our current code uses isn't. I've filed Issue #459 for this.