https://bugs.exim.org/show_bug.cgi?id=3151
Bug ID: 3151
Summary: External link to Freidl's Mastering Regular
Expressions book leads to another book. Have a link to
Friedl's free book
Product: Exim
Version: 4.99
Hardware: All
OS: All
Status: NEW
Severity: bug
Priority: low
Component: Documentation
Assignee: unalloca...@exim.org
Reporter: u...@net9.cf
CC: exim-dev@lists.exim.org
The link brings me to
https://www.oreilly.com/library/view/regular-expression-pocket/9780596514273/ .
If exim's doc wants a link to Friedl's book, which is also available for free
these days, it should use an explicit link.
index 6320113a7..23a172a7d 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -6612,14 +6612,11 @@ Chapter &<<CHAPplaintext>>& covers both.
Exim supports the use of regular expressions in many of its options. It
uses the PCRE2 regular expression library; this provides regular expression
matching that is compatible with Perl 5. The syntax and semantics of
-regular expressions is discussed in
-online Perl manpages, in
-many Perl reference books, and also in
-Jeffrey Friedl's &'Mastering Regular Expressions'&, which is published by
-O'Reilly (see &url(http://www.oreilly.com/catalog/regex2/)).
-. --- the http: URL here redirects to another page with the ISBN in the URL
-. --- where trying to use https: just redirects back to http:, so sticking
-. --- to the old URL for now. 2018-09-07.
+regular expressions is discussed in online Perl manpages, in many Perl
+reference books, and also in Jeffrey Friedl's
+&'Mastering Regular Expressions'&, which is also available for free
+(see, for example,
+&url(http://https://ia903204.us.archive.org/34/items/allitebooks-02/Mastering%20Regular%20Expressions%2C%203rd%20Edition.pdf)).
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