[PATCH v3 4/4] imap-send: match header names case insensitively

["Harald Nordgren via GitGitGadget" <gitgitgadget@gmail.com>]

From: Harald Nordgren <haraldnordgren@gmail.com>

imap-send says "no messages found to send" for a message whose headers
are spelled "from:", "date:" or "subject:", although RFC 5322 treats
header field names as case insensitive. Match the three names in any
case.

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
---
 imap-send.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/imap-send.c b/imap-send.c
index 1091825dfb..21e20d7720 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -1461,11 +1461,11 @@ static bool has_required_headers(const char *line)
 	bool from = false, date = false, subject = false;
 
 	while ((line = strchr(line, '\n')) && *++line != '\n') {
-		if (starts_with(line, "From: "))
+		if (istarts_with(line, "From: "))
 			from = true;
-		else if (starts_with(line, "Date: "))
+		else if (istarts_with(line, "Date: "))
 			date = true;
-		else if (starts_with(line, "Subject: "))
+		else if (istarts_with(line, "Subject: "))
 			subject = true;
 	}
 	return from && date && subject;
-- 
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