Guido Neitzer wrote:

> ----8<--------8<--------8<--------8<--------8<--------8<----
> 2.2.1. Unstructured Header Field Bodies
> 
> 
>    Some field bodies in this standard are defined simply as
>    "unstructured" (which is specified below as any US-ASCII characters,
>    except for CR and LF) with no further restrictions.  These are
>    referred to as unstructured field bodies.  Semantically,  
> unstructured
>    field bodies are simply to be treated as a single line of characters
>    with no further processing (except for header "folding" and
>    "unfolding" as described in section 2.2.3).
> 
> ----8<--------8<--------8<--------8<--------8<--------8<----

So see what "folding" means.  Section 2.2.3 says

2.2.3. Long Header Fields


   Each header field is logically a single line of characters comprising
   the field name, the colon, and the field body.  For convenience
   however, and to deal with the 998/78 character limitations per line,
   the field body portion of a header field can be split into a multiple
   line representation; this is called "folding".  The general rule is
   that wherever this standard allows for folding white space (not
   simply WSP characters), a CRLF may be inserted before any WSP.  For
   example, the header field:

           Subject: This is a test

   can be represented as:

           Subject: This
            is a test


-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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