Change: http URLs to https URLs when possible

Reported-By: F. T. on 2019-02-24

3 files changed, 17 insertions, 20 deletions

diff --git a/introduction.mdwn b/introduction.mdwn
index 1ff7739..da815bf 100644
--- a/introduction.mdwn
+++ b/introduction.mdwn
@@ -98,15 +98,15 @@ control, you'll be fine. Go read.
 Technicalities
 --------------
 
-This book is written using an [Ikiwiki](http://ikiwiki.info/) instance
-at <http://gtdfh.branchable.com/>,
-hosted on the [Branchable](http://www.branchable.com/) service. (I am
+This book is written using an [Ikiwiki](https://ikiwiki.info/) instance
+at <https://gtdfh.branchable.com/>,
+hosted on the [Branchable](https://www.branchable.com/) service. (I am
 involved in running Branchable.)
 
 Ikiwiki input is in Markdown format. I use scripts and tools to convert
 that into PDF, EPUB, and Mobipocket formats, for reading outside a browser.
-I'm currently using [Pandoc](http://johnmacfarlane.net/pandoc/) and
-[Calibre's ebook-convert](http://calibre-ebook.com/) to do this.
+I'm currently using [Pandoc](https://pandoc.org/) and
+[Calibre's ebook-convert](https://calibre-ebook.com/) to do this.
 
 The book is licensed under a CC-BY-SA 3.0 (Unported) license. However,
 the site is only editable by myself, at least for now. I gratefully
diff --git a/references.mdwn b/references.mdwn
index a2b8239..00a1691 100644
--- a/references.mdwn
+++ b/references.mdwn
@@ -2,6 +2,6 @@ References
 ==========
 
 * Getting things done
-    - <http://www.librarything.com/work/1844807>
+    - <https://www.librarything.com/work/1844807>
 * The now habit : a strategic program for overcoming procrastination and enjoying guilt-free play
-    - <http://www.librarything.com/work/7934/details/46964220>
+    - <https://www.librarything.com/work/7934/details/46964220>
diff --git a/sidebar.mdwn b/sidebar.mdwn
index 2d11094..3af119e 100644
--- a/sidebar.mdwn
+++ b/sidebar.mdwn
@@ -1,25 +1,22 @@
 Other formats:
 
-* [EPUB](http://files.liw.fi/gtdfh.epub)
-* [Mobipocket (Kindle)](http://files.liw.fi/gtdfh.mobi)
-* [PDF](http://files.liw.fi/gtdfh.pdf)
-* [No longer on Amazon](http://blog.liw.fi/posts/gtdfd-not-amazon/)
-* If you're feeling generous: buy something from my [Amazon
-  wishlist](http://www.amazon.co.uk/registry/wishlist/IAQ38FB6Y27D/).
-  Thanks!
+* [EPUB](https://files.liw.fi/gtdfh.epub)
+* [Mobipocket (Kindle)](https://files.liw.fi/gtdfh.mobi)
+* [PDF](https://files.liw.fi/gtdfh.pdf)
+* [No longer on Amazon](https://blog.liw.fi/posts/gtdfd-not-amazon/)
 
 See also:
 
-* [OpenLibary](http://openlibrary.org/works/OL16701871W/Getting_Things_Done_for_Hackers)
+* [OpenLibary](https://openlibrary.org/works/OL16701871W/Getting_Things_Done_for_Hackers)
 
 <hr />
 
 This is a book-type site written by
 Lars Wirzenius.
 
-* [My home page](http://liw.fi/)
-* [My blog](http://blog.liw.fi)
-* [Branchable](http://www.branchable.com/)
+* [My home page](https://liw.fi/)
+* [My blog](https://blog.liw.fi)
+* [Branchable](https://www.branchable.com/)
 
 This site is not publically editable, but I welcome comments and feedback,
 via the site's commenting system or via e-mail.
@@ -27,7 +24,7 @@ via the site's commenting system or via e-mail.
 However, this being the Internet, I need to point out that
 comments that are unconstructive, unhelpful, or unfunny may be removed.
 Until I can write my own, [Charles Stross's moderation
-policy](http://www.antipope.org/charlie/blog-static/2008/06/moderation-policy.html)
+policy](https://www.antipope.org/charlie/blog-static/2008/06/moderation-policy.html)
 looks good to me.
 
 I won't approve/keep comments about typo fixes, but they're still welcome:
@@ -40,5 +37,5 @@ All non-comment content on this site is copyrighted by Lars Wirzenius,
 with comments copyrighted by their authors; both content and comments
 are licensed under a 
 <a rel="license" 
-href="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons 
+href="https://creativecommons.org/licenses/by-sa/3.0/">Creative Commons 
 Attribution-Share Alike 3.0 Unported License</a>.