Fix extended range hits behind a ConVar

[Reabstraction]

Related Issue

None

Implementation

Very simply changes a few things:

• Makes a new ConVar that holds if we should fix the "broken" extended hits of demoknight
• Tracks when the player charges, and stores it
• When the player swings their sword, check the ConVar tf_demoextendedrangefix, if it is anything other than 0, enable the fix

This puts this technically balance change behind a "default-false" convar

Screenshots

Checklist

• No other PRs implement this idea.
• This PR does not introduce any regressions. (We only do things if tf_demoextendedrangefix is set)
• I certify that this PR is my own entirely original work, or I have permission from and have attributed the relevant authors.
• I have agreed to and signed this project's Contributor License Agreement.
• This PR targets the tc2-mod branch.

• This change has been filed as an issue.
• No other PRs address this.
• This PR is as minimal as possible.
• This PR does not introduce any regressions.
• This PR has been built and locally tested on at least one platform.
• This PR has been tested on all platforms, on both a dedicated server and on a listen server.

Testing Checklist

	Client	Server	Version
Windows
Linux

Caveats

Alternatives