pgindent run for release 9.3

This is the first run of the Perl-based pgindent script.  Also update
pgindent instructions.

src/bin/pgevent/pgevent.c

@@ -42,7 +42,6 @@ HRESULT
 DllInstall(BOOL bInstall,
 		   LPCWSTR pszCmdLine)
 {
-
 	if (pszCmdLine && *pszCmdLine != '\0')
 		wcstombs(event_source, pszCmdLine, sizeof(event_source));