Continue without sound if OpenAL setup fails
Remove duplicate OpenAL library loading and add logging
Replace switch with only one case with if statement
Merge pull request #1071 from msteiger/fix_221

Continue without sound if OpenAL setup fails
Tiny tweaks - log statement, move "crouch" to "CTRL", rename binding descriptions for crouch and jump slightly
Use boolean flag to indicate NetworkSystem host mode
Merge pull request #1072 from msteiger/fix_1069

Don't setup player instance in headless mode
Remove client entity from relevance region when removed
Merge branch 'emptyvoid' into jenkins