Documenting here-document quirk on OpenBSD

[Pavel Roskin]

Hello!

Sorry that it has taken so long to make this patch.

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--- ChangeLog
+++ ChangeLog
@@ -1 +1,6 @@
+2001-05-04  Pavel Roskin  <address@hidden>
+
+       * doc/autoconf.texi (Shellology): Document a quirk in
+       here-document handling on OpenBSD.
+
 2001-04-27  Akim Demaille  <address@hidden>
--- doc/autoconf.texi
+++ doc/autoconf.texi
@@ -5247,6 +5247,15 @@
 Mode,, Bash @sc{posix} Mode, bash, The GNU Bash Reference Manual}, for
 details.

address@hidden @command{/bin/sh} on OpenBSD
address@hidden @command{/bin/sh} on OpenBSD
+
+As a general rule, if @samp{\\} expands to @samp{\} use @samp{\\} to
+get @samp{\}. Don't rely on @samp{\} being preserved because it has
+no special meaning together with the next symbol. Notably, @samp{\"}
+expands to @samp{"} in here-in documents with unquoted delimiter
+under @command{/bin/sh} on OpenBSD 2.7.
+
 @item @command{/usr/xpg4/bin/sh} on Solaris
 @cindex @command{/usr/xpg4/bin/sh} on Solaris
 The @sc{posix}-compliant Bourne shell on a Solaris system is
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Regards,
Pavel Roskin