2006-12-15 [wwp] 2.6.1cvs40

2006-12-15 [wwp]	2.6.1cvs40

	* src/wizard.c
	* src/common/plugin.c
	* src/common/plugin.h
	* src/gtk/about.c
	* src/plugins/bogofilter/bogofilter.c
	* src/plugins/clamav/clamav_plugin.c
	* src/plugins/demo/demo.c
	* src/plugins/dillo_viewer/dillo_viewer.c
	* src/plugins/pgpcore/plugin.c
	* src/plugins/pgpinline/plugin.c
	* src/plugins/pgpmime/plugin.c
	* src/plugins/spamassassin/spamassassin.c
	* src/plugins/trayicon/trayicon.c
		factorize some translatable strings (plugins-related),
		fix missing punctuation in several places,
		remove useless translatable \n in about.c,
		and factorize plugin init code w/ a new function
		check_plugin_version() in common/plugin.c.
		Patch by Fabien Vantard <fzzzzz@gmail.com>.