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Header values must be defined

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1 parent 21a1479 commit 39b516860fe931f48a1f2530324beb81fbfd6abc @miyagawa miyagawa committed Jun 21, 2011
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  1. +3 −3 PSGI.pod
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6 PSGI.pod
@@ -413,9 +413,9 @@ or newlines in their name. It B<MUST NOT> contain any keys that end in C<-> or
C<_>.
All keys B<MUST> consist only of letters, digits, C<_> or C<->. All
-keys B<MUST> start with a letter. The value of the header must be a
-scalar string. The value string B<MUST NOT> contain characters below
-octal 037 i.e. chr(31).
+keys B<MUST> start with a letter. The value of the header B<MUST> be a
+scalar string and defined. The value string B<MUST NOT> contain
+characters below octal 037 i.e. chr(31).
If the same key name appears multiple times in an array ref, those
header lines B<MUST> be sent to the client separately (e.g. multiple

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