memory: more stubs

pfetch

@@ -297,6 +297,18 @@ get_memory() {
 
             mem_used=$((mem_full - (mem_free / 1024)))
         ;;
+
+        OpenBSD*)
+            # If you run OpenBSD and can send me the full output of
+            # 'vm_stat' I'll be able to add full support here.
+            mem_full=$(($(sysctl -n hw.physmem) / 1024 / 1024))
+        ;;
+
+        FreeBSD*|Dragonfly*)
+            # If you run FreeBSD or Dragonfly and can help me get
+            # the used memory amount, I'll be able to add support here.
+            mem_full=$(($(sysctl -n hw.physmem) / 1024 / 1024))
+        ;;
     esac
 
     log memory "${mem_used:-?}MiB / ${mem_full:-?}MiB"