OSG 3.5.5 + 3.4.39

• Targeted for next week
• New blahp version
• XRootD 4.11.0 + plugins
• Singularity 3.4.2 in 3.4 (3.4.2 should be available shortly for 3.5 via EPEL)
• Minor XCache and standalone XRootD fixes

Other

• OSG Software and Release are interested in increasing engagement for community testing
• BOINC accounting: we would like to see a short technical proposal for how US-ATLAS would like to account for BOINC jobs