When handling bookmark, use readlink, not realpath

This is to cd to path as it pointed by symlink, not to it's real path. Bookmarked directory may itself contain symlinks in path, which should be respected.

src/nnn.c

@@ -7053,7 +7053,7 @@ nochange:
 
 			pent = &pdents[cur];
 			if (!g_state.selbm || !(S_ISLNK(pent->mode) &&
-			                        realpath(pent->name, newpath) &&
+			                        readlink(pent->name, newpath, PATH_MAX) &&
 			                        xstrsncpy(path, lastdir, PATH_MAX)))
 				mkpath(path, pent->name, newpath);
 			g_state.selbm = 0;