Warning when build XS on ubuntu 20.04

[MikeBernson]

out.txt

I have upgrade from 18.04 to 20.04 and when compiling XS 0.62 I get a number of warning in
bpc_attrib.c, bpc_attribCache.c

The warning are all about snprintf

[craigbarratt]

Thanks for reporting this. The warnings are benign.

In rsync_bpc 3.1.3 I rewrote the backuppc-specific code that causes these warnings. I am planning on merging those changes into the next BackupPC::XS release.