auth: have cgit calculate login address

This way we're sure to use virtual root, or any other strangeness
encountered.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 682d8bb..8eafc4a 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -645,7 +645,7 @@ source filter::
         filtered contents is expected on standard output.
 
 auth filter::
-        The authentication filter receives 11 parameters:
+        The authentication filter receives 12 parameters:
           - filter action, explained below, which specifies which action the
             filter is called for
           - http cookie
@@ -656,8 +656,9 @@ auth filter::
           - cgit repo
           - cgit page
           - cgit url
+          - cgit login url
         When the filter action is "body", this filter must write to output the
-        HTML for displaying the login form, which POSTs to "/?p=login". When
+        HTML for displaying the login form, which POSTs to the login url. When
         the filter action is "authenticate-cookie", this filter must validate
         the http cookie and return a 0 if it is invalid or 1 if it is invalid,
         in the exit code / close function. If the filter action is