GWakeup: make it private API

Colin requests that we keep this one private for now.

Include it at each point of use (libglib, libgio, tests).

docs/reference/glib/Makefile.am

@@ -22,6 +22,9 @@ MKDB_OPTIONS=--sgml-mode --output-format=xml --name-space=g
 HFILE_GLOB=$(addprefix $(top_srcdir)/glib/,$(shell cat $(top_builddir)/glib/glib-public-headers.txt)) $(top_srcdir)/gmodule/*.h
 CFILE_GLOB=$(top_srcdir)/glib/*.c $(top_srcdir)/gmodule/*.c
 
+# Ignore some private headers
+IGNORE_HFILES = gwakeup.h
+
 # Images to copy into HTML directory
 HTML_IMAGES =  				\
 	file-name-encodings.png		\

docs/reference/glib/glib-docs.sgml

@@ -97,7 +97,6 @@ synchronize their operation.
       <xi:include href="xml/bookmarkfile.xml" />
       <xi:include href="xml/testing.xml" />
       <xi:include href="xml/gunix.xml" />
-      <xi:include href="xml/gwakeup.xml" />
       <xi:include href="xml/windows.xml" />
   </chapter>
 

docs/reference/glib/glib-sections.txt

@@ -3147,13 +3147,3 @@ g_hostname_is_ascii_encoded
 <SUBSECTION>
 g_hostname_is_ip_address
 </SECTION>
-
-<SECTION>
-<FILE>gwakeup</FILE>
-<TITLE>GWakeup</TITLE>
-g_wakeup_new
-g_wakeup_get_pollfd
-g_wakeup_signal
-g_wakeup_acknowledge
-g_wakeup_free
-</SECTION>