I have yet to encounter a non-contrived example where multiple interitance is a plausible solution to a problem. The simplified single inheritance and interface model caters for all practical examples, and *vastly* simplifies the internal workings.
How large is a pointer to a member variable?

The calculation to generate new primes is expensive (and in the past, was prohibitively so). As the prime numbers in DH are public (they are in the clear as part of the handshake), it was decided that using the same set of everything was a GoodIdea(tm).

This is not the case in reality, as a one-off week of cloud resource provides an attacker with sufficient data to decrypt the stream in realtime.

Because it is not like there is another Xen around in the world of servers...

This is a muppet misusing if(), not misusing goto.

The useful thing about longjmp() is that so few people even know about it. I find that it is a very useful question to sort the would-be "C Experts" at interview.

Now all I need is a 10 button mouse and an interface reference!

NUL (the character '\0') and NULL (the invalid pointer) are two very different things

Worse than that after boot, the BIOS runs in System Management Mode, which is delberatly designed to be non-interceptable by the OS.

A 4/4 split is completely impossible. x86 doesn't switch CR3 or TR automatically. At an absolute minimum, the kernel needs all its entry points (exception, interrupt and syscall/sysenter targets), and hardware structures (active pagetables, GDT, LDT and TSS) mapped into all virtual address spaces.

(wo)man up and set $EDITOR correctly for your environment. You might find visudo more accomodating.

Never - it is not in a general distros best interest. It is hard enough keeping on top of the kernel bugs with a signle configuration in use, let alone customising it to everyones hardware. Anyway, when it comes to drivers, the optimisations you can do are "dont load drivers you dont need", which is what already happens

Protecting against DDoS reflection attacks is very easy, but it requires all 1st-tier ISPs to perform egress IP validation, so packets coming from the end users trying to get onto the internet are checked that the IP address is correct. Filtering anywhere else is impossible because of transit routes, so by the time the second AS gets to inspect the packet, it could legitimatly be from anywhere.

The problem is that this costs money to implement and isn't in the interest of 1st-tier ISPs, so is unlikely to ever get done.

It is unknown code and bad design, which is arguably worse.

Nope - stack operations are just a single byte, even in 64bit mode.