CLEANUP: assorted typo fixes in the code and comments

This is 25th iteration of typo fixes

(cherry picked from commit 01881087fc0ad9922d6d5833766e30c032da1e1d)
[wt: dropped non-relevant parts]
Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/src/lb_fwrr.c b/src/lb_fwrr.c
index e2cdd9f..9219424 100644
--- a/src/lb_fwrr.c
+++ b/src/lb_fwrr.c
@@ -340,7 +340,7 @@
 	grp = (s->flags & SRV_F_BACKUP) ? &p->lbprm.fwrr.bck : &p->lbprm.fwrr.act;
 
 	/* Delay everything which does not fit into the window and everything
-	 * which does not fit into the theorical new window.
+	 * which does not fit into the theoretical new window.
 	 */
 	if (!srv_willbe_usable(s)) {
 		fwrr_remove_from_tree(s);