Last batch of 'static' qualifiers for module-level global variables.

Fix up modules in the 'apps' directory, and also correct the bad example of
enum definitions in include/asterisk/app.h, which many developers followed
(thanks for reading the documentation!). In addition, add some basic usage
examples of the 'pahole' and 'pglobal' tools to the coding guidelines.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@200656 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_page.c

@@ -101,13 +101,13 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  ***/
 static const char * const app_page= "Page";
 
-enum {
+enum page_opt_flags {
 	PAGE_DUPLEX = (1 << 0),
 	PAGE_QUIET = (1 << 1),
 	PAGE_RECORD = (1 << 2),
 	PAGE_SKIP = (1 << 3),
 	PAGE_IGNORE_FORWARDS = (1 << 4),
-} page_opt_flags;
+};
 
 AST_APP_OPTIONS(page_opts, {
 	AST_APP_OPTION('d', PAGE_DUPLEX),