docs: switch more URLs to https://

Normalize using https:// almost everywhere instead of http://

Closes #19872

docs/cmdline-opts/_ENVIRONMENT.md

@@ -31,12 +31,12 @@ This environment variable disables use of the proxy even when specified with
 the --proxy option. That is
 
     NO_PROXY=direct.example.com curl -x http://proxy.example.com
-    http://direct.example.com
+    https://direct.example.com
 
 accesses the target URL directly, and
 
     NO_PROXY=direct.example.com curl -x http://proxy.example.com
-    http://somewhere.example.com
+    https://somewhere.example.com
 
 accesses the target URL through the proxy.
 

docs/cmdline-opts/_GLOBBING.md

@@ -6,7 +6,9 @@ or ranges within brackets. We call this "globbing".
 
 Provide a list with three different names like this:
 
-    http://site.{one,two,three}.com
+    https://fun.example/{one,two,three}.jpg
+
+    sftp://{one,two,three}.example/README
 
 Do sequences of alphanumeric series by using [] as in:
 
@@ -23,14 +25,14 @@ With letters through the alphabet:
 Nested sequences are not supported, but you can use several ones next to each
 other:
 
-    http://example.com/archive[1996-1999]/vol[1-4]/part{a,b,c}.html
+    https://example.com/archive[1996-1999]/vol[1-4]/part{a,b,c}.html
 
 You can specify a step counter for the ranges to get every Nth number or
 letter:
 
-    http://example.com/file[1-100:10].txt
+    https://example.com/file[1-100:10].txt
 
-    http://example.com/file[a-z:2].txt
+    https://example.com/file[a-z:2].txt
 
 When using [] or {} sequences when invoked from a command line prompt, you
 probably have to put the full URL within double quotes to avoid the shell from