Add a FAQ about Y2K compliance.

Submitted by:	Lars Eilebrecht <Lars.Eilebrecht@unix-ag.org>

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@79284 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/misc/FAQ.html b/docs/manual/misc/FAQ.html
index 82ba7466c5ba280fb64e38e4a9d3fcf1afb4488d..50e66a1743329e0d5637ccceb07dbc47b0140690 100644 (file)
--- a/docs/manual/misc/FAQ.html
+++ b/docs/manual/misc/FAQ.html
@@ -15,7 +15,7 @@
   <!--#include virtual="header.html" -->
   <H1 ALIGN="CENTER">Apache Server Frequently Asked Questions</H1>
   <P>
-  $Revision: 1.88 $ ($Date: 1997/09/17 16:32:21 $)
+  $Revision: 1.89 $ ($Date: 1997/09/18 13:00:15 $)
   </P>
   <P>
   The latest version of this FAQ is always available from the main
@@ -252,6 +252,8 @@
    <LI><A HREF="#cgi-spec">Where can I find the &quot;CGI
     specification&quot;?</A>
    </LI>
+   <LI><A HREF="#year2000">Is Apache Year 2000 compliant?</A>
+   </LI>
   </OL>
  </LI>
 </UL>
@@ -1354,7 +1356,9 @@
   <A HREF="../mod/core.html#serverroot">ServerRoot</A>
   directory. As of Apache version 1.3, the location can be set <EM>via</EM>
   the
-  <A HREF="../mod/core.html#coredumpdirectory">CoreDumpDirectory</A>
+  <A
+   HREF="../mod/core.html#coredumpdirectory"
+  ><SAMP>CoreDumpDirectory</SAMP></A>
   directive to a different directory. Make sure that this directory is
   writable by the user the server runs as (as opposed to the user the server
   is <EM>started</EM> as).
@@ -2054,6 +2058,51 @@
   </P>
   <HR>
  </LI>
+ <LI><A NAME="year2000">
+      <STRONG>Is Apache Year 2000 compliant?</STRONG>
+     </A>
+  <P>
+  Yes, Apache is Year 2000 compliant.
+  </P>
+  <P>
+  Apache internally never stores years as two digits.
+  On the HTTP protocol level RFC1123-style addresses are generated
+  which is the only format a HTTP/1.1-compliant server should
+  generate. To be compatible with older applications Apache
+  recognizes ANSI C's <CODE>asctime()</CODE> and
+  RFC850-/RFC1036-style date formats, too.
+  The <CODE>asctime()</CODE> format uses four-digit years,
+  but the RFC850 and RFC1036 date formats only define a two-digit year.
+  If Apache sees such a date with a value less than 70 it assumes that
+  the century is <SAMP>20</SAMP> rather than <SAMP>19</SAMP>.
+  </P>
+  <P>
+  Some aspects of Apache's output may use two-digit years, such as the
+  automatic listing of directory contents provided by
+  <A
+   HREF="../mod/mod_autoindex.html"
+  ><SAMP>mod_autoindex</SAMP></A>
+  with the
+  <A
+   HREF="../mod/mod_autoindex.html#indexoptions"
+  ><SAMP>FancyIndexing</SAMP></A>
+  option enabled, but it is improper to depend upon such displays for
+  specific syntax.  And even that issue is being addressed by the
+  developers; a future version of Apache should allow you to format that
+  display as you like.
+  </P>
+  <P>
+  Although Apache is Year 2000 compliant, you may still get problems
+  if the underlying OS has problems with dates past year 2000
+  (<EM>e.g.</EM>, OS calls which accept or return year numbers).
+  Most (UNIX) systems store dates internally as signed 32-bit integers
+  which contain the number of seconds since 1<SUP>st</SUP> January 1970, so
+  the magic boundary to worry about is the year 2038 and not 2000.
+  But modern operating systems shouldn't cause any trouble
+  at all.
+  </P>
+  <HR>
+ </LI>
 
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