Use a default location for spectre.pid, tweak the gotchas text. Addresses bug #10822.

docs/changelog/7.x.x.txt

@@ -1,4 +1,5 @@
 7.7.19
+ - fixed #10822: spectre pid sucks
  - fixed #10817: Datatable not internationalized
  - fixed #10816: Minor Capitalization Issue
  - fixed #10814: matrix translations

docs/gotcha.txt

@@ -41,16 +41,20 @@ save you many hours of grief.
       will cause an error during the 7.6.32 upgrade.  Later versions
       of these modules should work.
 
-    * Spectre now works like many other programs and writes a PID
-      file.  The location of that file is required to be in your
-      spectre.conf file:
+    * Spectre now works like many other programs and uses a PID
+      file.  By default, it will use /var/run/spectre.pid, but you
+      can change that in your spectre.conf file:
 
 # The location of the file that keeps track of the master spectre
 # processId.
-"pidFile" : "/var/run/spectre.pid",  ##or /data/wre/var/logs, or someplace else
+"pidFile" : "/data/wre/var/logs/spectre.pid",
 
       After installing this version, you will need to manually kill
-      spectre, but it can be started again through the spectre script.
+      spectre:
+
+      killall spectre.pl
+
+      before starting it again.
 
     * The Default Gallery Album View Thumbnails template has been reworked
       to get rid of intermittent rendering bugs with IE7.  The thumbnail