add nohang-desktop.service; rename psi-monitor to psi2log; update Makefile

tools/psi-monitor.1

@@ -1,5 +0,0 @@
-.TH psi-monitor 1
-
-.SH NAME
-
-psi-monitor \- PSI metrics monitor

tools/psi2log

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""psi-monitor"""
+"""psi2log"""
 
 import os
 from time import sleep

tools/psi2log.1

@@ -0,0 +1,5 @@
+.TH psi2log 1
+
+.SH NAME
+
+psi2log \- PSI metrics monitor and logger