ClamAV broken version check

If you’ve just built and installed the new version 0.94 of ClamAV (because it reminded you that your current version was out of date), and you’re using the experimental features, it exposes a rather dumb bug that results in these messages in your freshclam log:

@4000000048be74fd0687f57c Software version from DNS: 0.94
@4000000048be74fd0688245c WARNING: Your ClamAV installation is OUTDATED!
@4000000048be74fd06883014 WARNING: Local version: 0.94-exp Recommended version: 0.94

Apparently ClamAV’s version comparison is not terribly clever, and the ‘new feature’ of marking experimental versions with ‘-exp’ has tripped it up. I’m sure there are multiple workarounds, but I changed this in shared/misc.c:

#ifdef CL_EXPERIMENTAL
/*#define EXP_VER “-exp”*/
#define EXP_VER
#else
#define EXP_VER
#endif

as the EXP_VER string is what gets appended to the version number (apparently only for display purposes, but it does the trick). I then rebuilt it and now my log says:

@4000000048be848926da098c Software version from DNS: 0.94

Yay – no error!

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