We'd like to make our site, lifering.org, run entirely on HTTPS, partly because Google now gives that configuration a boost, and partly because our users are (or want to be) in recovery from substance abuse.
The plugin WordPress HTTPS is a year and a half out of date and isn't certified to the current version of WP. Despite its high ratings this makes us nervous.
I've set the home and siteurl fields to use https instead of http and this seems to work pretty generally, except for internal links where http is hard coded. I've been experimenting with protocol relative links and the change works well - things that came up http now come up https. But our site has about 100 pages and changing all those manually is daunting. Would it be feasible - and a good idea! - to make a global change in the database?? I can construct the SQL query but I'm not sure what tables I should change.