Fix typos, update copyright dates

Author: Charlie Fenton

client/app.cpp

@@ -1,6 +1,6 @@
 // This file is part of BOINC.
 // http://boinc.berkeley.edu
-// Copyright (C) 2008 University of California
+// Copyright (C) 2022 University of California
 //
 // BOINC is free software; you can redistribute it and/or modify it
 // under the terms of the GNU Lesser General Public License

lib/procinfo_mac.cpp

@@ -1,6 +1,6 @@
 // This file is part of BOINC.
 // http://boinc.berkeley.edu
-// Copyright (C) 2020 University of California
+// Copyright (C) 2022 University of California
 //
 // BOINC is free software; you can redistribute it and/or modify it
 // under the terms of the GNU Lesser General Public License
@@ -185,7 +185,7 @@ double total_cpu_time() {
     static double scale;
     uint64_t totalUserTime = 0;
 
-    if (!first) {
+    if (first) {
         first = false;
         long hz = sysconf(_SC_CLK_TCK);
         scale = 1./hz;

lib/procinfo_unix.cpp

@@ -1,6 +1,6 @@
 // This file is part of BOINC.
 // http://boinc.berkeley.edu
-// Copyright (C) 2008 University of California
+// Copyright (C) 2022 University of California
 //
 // BOINC is free software; you can redistribute it and/or modify it
 // under the terms of the GNU Lesser General Public License