byobu should revert to dmidecode if bogomips in /proc/cpuinfo are set to zero

A number of cloud server offerings -- e.g., those from Oracle (OCI), Hetzner, Netcup -- based on current Ampere® Altra® processors report zero bogomips on Linux, which results in a reported cpu frequency of "0.0 GHz".
However, it's possible to revert to dmidecode which actually reports the correct current/base clock speed (in MHz).

The below patch should apply for all/all recent versions of byobu:

--- byobu-6.10.orig/usr/lib/byobu/cpu_freq
+++ byobu-6.10/usr/lib/byobu/cpu_freq
@@ -37,6 +37,11 @@ __cpu_freq() {
                        count=$(getconf _NPROCESSORS_ONLN 2>/dev/null || grep -ci "^processor" /proc/cpuinfo)
                        freq=$(egrep -i -m 1 "^bogomips" /proc/cpuinfo | awk -F"[:.]" '{ print $2 }')
                        freq=$(printf "%s %s" "$freq" "$count" | awk '{printf "%01.1f\n", $1/$2/1000}')
+ if [ $freq = "0.0" ]; then
+ hz=$(dmidecode | egrep -m 1 -i "current speed:" | sed -e 's|.*: ||' -e 's| .*||')
+ fpdiv $hz "1000" 1 # 1Ghz
+ freq="$_RET"
+ fi
                fi
        elif hz=$(sysctl -n hw.cpufrequency 2>/dev/null); then
                fpdiv $hz "1000000000" 1 # 1Ghz