log --grep: accept --basic-regexp and --perl-regexp

diff --git a/RelNotes b/RelNotes
index 19bb2ebbe687d9ded1a5c82d28d4410de1e2f19f..2484b38bbbae654684f65a874653487439f0df2f 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes/1.7.12.txt
\ No newline at end of file
+Documentation/RelNotes/1.8.0.txt
\ No newline at end of file