Support mudlib source control with git

[taedlar]

Summary

Traditional people management in a LPMud involves several rols: Administrator, Archwizards, Wizards, and Players. These bring human politics into a MUD, either intended or undesired.

Neolith is started as foundation driver for the ES2 mudlib that targets to be an open-source mudlib. This makes human politics unnecessary or even undesired.

To make the "development" of such a MUD easier, we may learn from the open-source society and adopt Git source control for mudlibs. Using Git means the administrator can grant fine-grained access rights to individual Archwizards / Wizards without using LPC to implement file access rules (an overhead to the MUD and has little benefit to ordinary Players).

Ideas

• All LPC code change for production instance must go through git pulls.
• Add efuns to invoke pre-defined git operations like git-pull, git-checkout on mudlib
• LPC code are allowed to save object data, write logs, bot NOT allowed to change LPC code.