Rework player/user permissions system

[fluorescent-net]

Current schema:

    #define R_FUN           0x1
    #define R_SERVER        0x2
    #define R_DEBUG         0x4
    #define R_PERMISSIONS   0x8
    #define R_MENTOR        0x10
    #define R_MOD           0x20
    #define R_ADMIN         0x40
    #define R_HOST          0x80 

[SpadesSlick]

We should leave only those flags:

• MENTOR. Remove aghost, check all player panel interaction. They likely don't need everything that could be done with it.
• MOD. Include BAN flag contents. Remove subtle messages, paralyze_mob. Since we will have a lot of mods, they might need some tools from ADMIN flag, like "Jump to...". They also will need new verb to toggle OOC temporary only, and automatically turning it on after some time.
• ADMIN. Include BAN, MOD, VAREDIT, STEALTH flag contents.
• FUN. Include BUILDMODE, SPAWN, REJUVINATE, SOUND, POSSES flag contents.
• DEBUG.
• SERVER.
• PERMISSIONS.