Added formatting for utc_time segment

Can help distinguish UTC from local time more easily.

Author: Brodie Kurczynski

segments/utc_time.sh

@@ -1,6 +1,23 @@
 # Prints the current time in UTC.
 
+TMUX_POWERLINE_SEG_UTC_TIME_FORMAT_DEFAULT="%H:%M %Z"
+
+generate_segmentrc() {
+	read -d '' rccontents  << EORC
+# date(1) format for the UTC time.
+export TMUX_POWERLINE_SEG_UTC_TIME_FORMAT="${TMUX_POWERLINE_SEG_UTC_TIME_FORMAT_DEFAULT}"
+EORC
+	echo "$rccontents"
+}
+
+__process_settings() {
+	if [ -z "$TMUX_POWERLINE_SEG_UTC_TIME_FORMAT" ]; then
+		export TMUX_POWERLINE_SEG_UTC_TIME_FORMAT="${TMUX_POWERLINE_SEG_UTC_TIME_FORMAT_DEFAULT}"
+	fi
+}
+
 run_segment() {
-	date -u +"%H:%M"
+        __process_settings
+	date -u +"$TMUX_POWERLINE_SEG_UTC_TIME_FORMAT"
 	return 0
 }