docs: install documentation picture alongside documentation files

ChangeLog

@@ -1,3 +1,6 @@
+Mon Nov 04 15:43:00 MSK 2017
+	Minor documentation installation fixes. -EG
+
 Mon Nov 27 22:58:38 CET 2017
 	Tolerate AF_UNIX when trying to determine our binding port
 	from socket.  Use `sockaddr_storage` instead of trying to

doc/Makefile.am

@@ -35,3 +35,23 @@ EXTRA_DIST = \
   $(microhttpd_TEXINFOS) \
   libmicrohttpd_performance_data.png \
   libmicrohttpd_performance_data.eps
+
+install-info-local:
+	@echo " $(MKDIR_P) '$(DESTDIR)$(infodir)'"; \
+	$(MKDIR_P) "$(DESTDIR)$(infodir)" || exit 1; \
+	echo " $(INSTALL_DATA) libmicrohttpd_performance_data.png '$(DESTDIR)$(infodir)'"; \
+	$(INSTALL_DATA) $(srcdir)/libmicrohttpd_performance_data.png "$(DESTDIR)$(infodir)" || exit 1; 
+
+install-html-local:
+	@if test -n "$(htmldir)"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(htmldir)/libmicrohttpd.html'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(htmldir)/libmicrohttpd.html" || exit 1; \
+	  echo " $(INSTALL_DATA) libmicrohttpd_performance_data.png '$(DESTDIR)$(htmldir)/libmicrohttpd.html'"; \
+	  $(INSTALL_DATA) $(srcdir)/libmicrohttpd_performance_data.png "$(DESTDIR)$(htmldir)/libmicrohttpd.html" || exit 1; \
+	else : ; fi
+
+uninstall-local:
+	@if test -d "$(DESTDIR)$(infodir)"; then \
+	  echo " rm -f '$(DESTDIR)$(infodir)/libmicrohttpd_performance_data.png'"; \
+	  rm -f "$(DESTDIR)$(infodir)/libmicrohttpd_performance_data.png" \
+	else : ; fi