Fix notmuch.c to call add_timestamp/get_timestamp with path names
relative to the database path. (Otherwise, moving the database to a
new directory will result in notmuch creating new timestamp documents
and leaving stale ones behind.)
Fix notmuch.c to call add_timestamp/get_timestamp with path names
relative to the database path. (Otherwise, moving the database to a
new directory will result in notmuch creating new timestamp documents
and leaving stale ones behind.)