Docs: De-clarify the rfc2047 default charset

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index d5cd22ef74a551d308e74ff22d618f1aad78b5df..af41e4493f8f4e70682abc3af779592c1d94ebf5 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -1860,7 +1860,7 @@ described RFC 2047. This makes it possible to transmit characters that are not
 in the ASCII character set, and to label them as being in a particular
 character set. When Exim is inspecting header lines by means of the &%$h_%&
 mechanism, it decodes them, and translates them into a specified character set
 in the ASCII character set, and to label them as being in a particular
 character set. When Exim is inspecting header lines by means of the &%$h_%&
 mechanism, it decodes them, and translates them into a specified character set

-(default ISO-8859-1). The translation is possible only if the operating system
+(default is set at build time). The translation is possible only if the operating system

 supports the &[iconv()]& function.
 
 However, some of the operating systems that supply &[iconv()]& do not support
 supports the &[iconv()]& function.
 
 However, some of the operating systems that supply &[iconv()]& do not support


@@ -10328,7 +10328,7 @@ f.7.2.0.0.0.0.c.d.c.b.a.1.0.0.0.9.0.0.0.2.4.c.0.8.b.d.0.1.0.0.2
 This operator encodes text according to the rules of RFC 2047. This is an
 encoding that is used in header lines to encode non-ASCII characters. It is
 assumed that the input string is in the encoding specified by the
 This operator encodes text according to the rules of RFC 2047. This is an
 encoding that is used in header lines to encode non-ASCII characters. It is
 assumed that the input string is in the encoding specified by the

-&%headers_charset%& option, which defaults to ISO-8859-1. If the string
+&%headers_charset%& option, which gets its default at build time. If the string

 contains only characters in the range 33&--126, and no instances of the
 characters
 .code
 contains only characters in the range 33&--126, and no instances of the
 characters
 .code


@@ -24357,7 +24357,7 @@ replaced, not just the working part. The replacement must be a complete RFC
 2822 address, including the angle brackets if necessary. If text outside angle
 brackets contains a character whose value is greater than 126 or less than 32
 (except for tab), the text is encoded according to RFC 2047. The character set
 2822 address, including the angle brackets if necessary. If text outside angle
 brackets contains a character whose value is greater than 126 or less than 32
 (except for tab), the text is encoded according to RFC 2047. The character set

-is taken from &%headers_charset%&, which defaults to ISO-8859-1.
+is taken from &%headers_charset%&, which gets its default at build time.

 
 When the &"w"& flag is set on a rule that causes an envelope address to be
 rewritten, all but the working part of the replacement address is discarded.
 
 When the &"w"& flag is set on a rule that causes an envelope address to be
 rewritten, all but the working part of the replacement address is discarded.