Various code tidyups based on review commentary from BenBE

configure.ac

@@ -101,7 +101,7 @@ esac
 
 AC_ARG_ENABLE([pcp],
               [AS_HELP_STRING([--enable-pcp],
-                              [build a pcp htop binary @<:@default=no@:>@])],
+                              [build a pcp-htop binary @<:@default=no@:>@])],
               [],
               [enable_pcp=no])
 case "$enable_pcp" in

pcp/PCPProcess.h

@@ -9,7 +9,7 @@ Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "config.h"
+#include "config.h" // IWYU pragma: keep
 
 #include <stdbool.h>
 #include <sys/types.h>
@@ -19,6 +19,7 @@ in the source distribution for its full text.
 #include "RichString.h"
 #include "Settings.h"
 
+
 #define PROCESS_FLAG_LINUX_CGROUP   0x0800
 #define PROCESS_FLAG_LINUX_OOM      0x1000
 #define PROCESS_FLAG_LINUX_SMAPS    0x2000

pcp/PCPProcessList.h

@@ -7,17 +7,19 @@ Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "config.h"
+#include "config.h" // IWYU pragma: keep
 
 #include <stdbool.h>
 #include <sys/types.h>
 
 #include "Hashtable.h"
 #include "ProcessList.h"
-#include "pcp/Platform.h"
 #include "UsersTable.h"
+
+#include "pcp/Platform.h"
 #include "zfs/ZfsArcStats.h"
 
+
 typedef enum CPUMetric_ {
    CPU_TOTAL_TIME,
    CPU_USER_TIME,

pcp/Platform.c

@@ -7,7 +7,9 @@ Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
 */
 
-#include "config.h"
+#include "config.h" // IWYU pragma: keep
+
+#include "Platform.h"
 
 #include <math.h>
 
@@ -29,7 +31,6 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "PCPProcess.h"
 #include "PCPProcessList.h"
-#include "Platform.h"
 #include "ProcessList.h"
 #include "ProvideCurses.h"
 #include "Settings.h"
@@ -38,6 +39,7 @@ in the source distribution for its full text.
 #include "TasksMeter.h"
 #include "UptimeMeter.h"
 #include "XUtils.h"
+
 #include "linux/PressureStallMeter.h"
 #include "linux/ZramMeter.h"
 #include "linux/ZramStats.h"

pcp/Platform.h

@@ -13,6 +13,7 @@ in the source distribution for its full text.
 #include <stdbool.h>
 #include <pcp/pmapi.h>
 
+/* use htop config.h values for these macros, not pcp values */
 #undef PACKAGE_URL
 #undef PACKAGE_NAME
 #undef PACKAGE_STRING