doc: remove URL for ICU explorer/locexp

The old URL was HTTP 404 and the git link didn't build.  Also update two
other ICU links.  If we ever get a good link we will add it back.

Reported-by: Anton Voloshin
Author: Laurenz Albe

Backpatch-through: 10

diff --git a/doc/src/sgml/charset.sgml b/doc/src/sgml/charset.sgml
index 05a6bf568f4830ad014acf31caedeece7e677509..f203c368c2f030cb751c0ece00592a64888cb7b8 100644 (file)
--- a/doc/src/sgml/charset.sgml
+++ b/doc/src/sgml/charset.sgml
@@ -747,8 +747,8 @@ CREATE COLLATION german (provider = libc, locale = 'de_DE');
     set that is preloaded by initdb.  Users are encouraged
     to define their own collation objects that make use of these facilities to
     suit the sorting behavior to their requirements.
-    See ://userguide.icu-project.org/locale">
-    and ://userguide.icu-project.org/collation/api"> for
+    See s://unicode-org.github.io/icu/userguide/locale/">
+    and s://unicode-org.github.io/icu/userguide/collation/api.html"> for
     information on ICU locale naming.  The set of acceptable names and
     attributes depends on the particular ICU version.
    
@@ -842,10 +842,6 @@ CREATE COLLATION german (provider = libc, locale = 'de_DE');
     subtag) can be found in
     the CLDR
     repository.
-    The ICU Locale
-    Explorer can be used to check the details of a particular locale
-    definition.  The examples using the k* subtags require
-    at least ICU version 54.