nwconn: route AFP access timestamps through atime

tests/linux/README.md

@@ -840,6 +840,24 @@ The report showed `bitmap=0x2000`, `backup=0x576eb9aa`, and the backing xattr
 `1700000000`.
 
 
+### AFP Access Date/Time smoke
+
+`afp_set_file_info_smoke` supports the WebSDK Access Date/Time request bitmap
+`0x0400` via:
+
+```sh
+./afp_set_file_info_smoke \
+  -S MARS -U SUPERVISOR -P secret \
+  --access-time-only --access-time-epoch 1700000000 \
+  SYS:PUBLIC/pmdflts.ini
+```
+
+The server stores Access Date/Time through the existing POSIX `st_atime` path,
+preserving `st_mtime` with `utime()` and enforcing trustee Modify rights before
+changing the timestamp.  The AFP file-information record exposes the Access
+Date at offset 22; no AFP-specific xattr is added for this NetWare-semantic
+timestamp.
+
 ### AFP Create Date/Time smoke
 
 `afp_set_file_info_smoke` supports the WebSDK Create Date/Time request bitmap