[RFC] search: use boolean prefix for filenames in diffs, too

[Eric Wong <e@80x24.org>]

Filenames within a project tend to be reasonably stable within a
project and I plan on having automated searches hit these.

Also, using no term prefix at all (the default for searching)
still allows probabilistic searches on everything that's in a
"git diff", including the blob names which were just made
boolean.

Note, attachment filenames ("n:" prefix) will stil use
probabilistic search, as they're hardly standardized.
---
 lib/PublicInbox/Search.pm | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index 090d998..6e006fd 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -53,6 +53,9 @@ my %bool_pfx_external = (
 	dfpre => 'XDFPRE',
 	dfpost => 'XDFPOST',
 	dfblob => 'XDFPRE XDFPOST',
+	dfn => 'XDFN',
+	dfa => 'XDFA',
+	dfb => 'XDFB',
 );
 
 my $non_quoted_body = 'XNQ XDFN XDFA XDFB XDFHH XDFCTX XDFPRE XDFPOST';
@@ -72,9 +75,6 @@ my %prob_prefix = (
 
 	q => 'XQUOT',
 	nq => $non_quoted_body,
-	dfn => 'XDFN',
-	dfa => 'XDFA',
-	dfb => 'XDFB',
 	dfhh => 'XDFHH',
 	dfctx => 'XDFCTX',