Edit config.def.h function descriptions

config.def.h

@@ -11,21 +11,25 @@
 - battery_state (battery charging state) [argument: battery name]
 - cpu_perc (cpu usage in percent) [argument: NULL]
 - datetime (date and time) [argument: format]
-- disk_free (disk usage in percent) [argument: mountpoint]
+- disk_free (free disk space in GB) [argument: mountpoint]
 - disk_perc (disk usage in percent) [argument: mountpoint]
-- disk_total (disk usage in percent) [argument: mountpoint]
-- disk_used (disk usage in percent) [argument: mountpoint]
+- disk_total (total disk space in GB) [argument: mountpoint]
+- disk_used (used disk space in GB) [argument: mountpoint]
 - entropy (available entropy) [argument: NULL]
 - gid (gid of current user) [argument: NULL]
 - hostname [argument: NULL]
 - ip (ip address) [argument: interface]
 - load_avg (load average) [argument: NULL]
-- ram_free (ram usage in percent) [argument: NULL]
+- ram_free (free ram in GB) [argument: NULL]
 - ram_perc (ram usage in percent) [argument: NULL]
-- ram_total (ram usage in percent) [argument: NULL]
-- ram_used (ram usage in percent) [argument: NULL]
+- ram_total (total ram in GB) [argument: NULL]
+- ram_used (used ram in GB) [argument: NULL]
 - run_command (run custom shell command) [argument: command]
-- temp (temperature in degrees) [argument: temperature file]
+- swap_free (free swap in GB) [argument: NULL]
+- swap_perc (swap usage in percent) [argument: NULL]
+- swap_total (total swap in GB) [argument: NULL]
+- swap_used (used swap in GB) [argument: NULL]
+- temp (temperature in celsius) [argument: temperature file]
 - uid (uid of current user) [argument: NULL]
 - uptime (uptime) [argument: NULL]
 - username (username of current user) [argument: NULL]