Fix comments about what is stored in the database

Commit 567bcbc2 introduced two new values for each message (content of the
"From" and "Subject" headers), but the comments about the database schema had
not been updated accordingly.

diff --git a/lib/database.cc b/lib/database.cc
index f1a9dc2ed25f9934bf990cc40d40375fb108ece5..d11dfaf3dc7245b6b0f7988f5056144e318d8dd4 100644 (file)
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -81,13 +81,17 @@ typedef struct {
  *                     STRING is the name of a file within that
  *                     directory for this mail message.
  *
- *    A mail document also has two values:
+ *    A mail document also has four values:
  *
  *     TIMESTAMP:      The time_t value corresponding to the message's
  *                     Date header.
  *
  *     MESSAGE_ID:     The unique ID of the mail mess (see "id" above)
  *
+ *     FROM:           The value of the "From" header
+ *
+ *     SUBJECT:        The value of the "Subject" header
+ *
  * In addition, terms from the content of the message are added with
  * "from", "to", "attachment", and "subject" prefixes for use by the
  * user in searching. Similarly, terms from the path of the mail