email: Accept inline body with disposition params

A mail client may indicate a header parameter (such as Novell Groupwise,
which may add something like

Content-Disposition: inline; modification-time: "Thu ..."

) Previously, the system would not consider the content to be a candidate
for the email body, because it has parameters to the content-disposition
header.

This patch will still consider the part to be a candidate for the body if
the mime types match and no filename is found in the content-disposition
parameters.

include/class.mailfetch.php

@@ -297,7 +297,11 @@ class MailFetcher {
             $struct=@imap_fetchstructure($this->mbox, $mid);
 
         //Match the mime type.
-        if($struct && !$struct->ifdparameters && strcasecmp($mimeType, $this->getMimeType($struct))==0) {
+        if($struct
+                && strcasecmp($mimeType, $this->getMimeType($struct))==0
+                && (!$struct->ifdparameters
+                    || !$this->findFilename($struct->dparameters))) {
+
             $partNumber=$partNumber?$partNumber:1;
             if(($text=imap_fetchbody($this->mbox, $mid, $partNumber))) {
                 if($struct->encoding==3 or $struct->encoding==4) //base64 and qp decode.