```
games/ioquake3: Fix CVE-2017-6903
- Backport fix based on patchset for urbanterror [1]
- Fix build errors with -O0 -O1 (i.e. DEBUG builds)
- Add option to build game VMs
- Allow DEBUG builds for -server ports, too
https://github.com/mickael9/ioq3-for-UrbanTerror-4/tree/fix-cve-2017-6903 [1]
PR: 217911
#Reviewed by: koobs
Approved by: koobs (mentor)
Security: CVE-2017-6903
#Differential Revision: D10171
```