2006-09-28 [ticho] 2.5.2cvs13

2006-09-28 [ticho]	2.5.2cvs13

	* src/export.c
	* src/messageview.c
	* src/mimeview.c
	* src/news.c
	* src/pop.c
	* src/prefs_themes.c
	* src/procmsg.c
		Small i18n string optimization.
	* src/send_message.c
	* src/summaryview.c
	* src/common/session.c
	* src/common/smtp.c
	* src/common/ssl_certificate.c
	* src/common/utils.c
		Use "Couldn't" instead of "Can't" in UI messages,
		where appropriate.