Just like in bgpd, the special return value of imsg_get(3) is unused,
so replace with the simpler imsgbuf_get(3). With recent cleanup, there
are no imsg_get(3) left in httpd(8).

Index: sbin/iked/control.c
===================================================================
RCS file: /cvs/src/sbin/iked/control.c,v
diff -u -p -r1.45 control.c
--- sbin/iked/control.c	21 Nov 2024 13:35:20 -0000	1.45
+++ sbin/iked/control.c	24 Jul 2026 04:18:15 -0000
@@ -279,7 +279,7 @@ control_dispatch_imsg(int fd, short even
 	}
 
 	for (;;) {
-		if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
+		if ((n = imsgbuf_get(&c->iev.ibuf, &imsg)) == -1) {
 			control_close(fd, cs);
 			return;
 		}
Index: usr.sbin/ikectl/ikectl.c
===================================================================
RCS file: /cvs/src/usr.sbin/ikectl/ikectl.c,v
diff -u -p -r1.36 ikectl.c
--- usr.sbin/ikectl/ikectl.c	21 Nov 2024 13:38:14 -0000	1.36
+++ usr.sbin/ikectl/ikectl.c	24 Jul 2026 04:24:36 -0000
@@ -350,8 +350,8 @@ main(int argc, char *argv[])
 			errx(1, "pipe closed");
 
 		while (!done) {
-			if ((n = imsg_get(ibuf, &imsg)) == -1)
-				errx(1, "imsg_get error");
+			if ((n = imsgbuf_get(ibuf, &imsg)) == -1)
+				errx(1, "imsgbuf_get error");
 			if (n == 0)
 				break;
 			switch (res->action) {
Index: usr.sbin/relayd/control.c
===================================================================
RCS file: /cvs/src/usr.sbin/relayd/control.c,v
diff -u -p -r1.68 control.c
--- usr.sbin/relayd/control.c	14 Jun 2026 08:53:06 -0000	1.68
+++ usr.sbin/relayd/control.c	24 Jul 2026 04:22:09 -0000
@@ -256,7 +256,7 @@ control_dispatch_imsg(int fd, short even
 	}
 
 	for (;;) {
-		if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
+		if ((n = imsgbuf_get(&c->iev.ibuf, &imsg)) == -1) {
 			control_close(fd, cs);
 			return;
 		}
Index: usr.sbin/relayctl/relayctl.c
===================================================================
RCS file: /cvs/src/usr.sbin/relayctl/relayctl.c,v
diff -u -p -r1.64 relayctl.c
--- usr.sbin/relayctl/relayctl.c	19 Jun 2026 12:50:39 -0000	1.64
+++ usr.sbin/relayctl/relayctl.c	24 Jul 2026 04:23:41 -0000
@@ -232,8 +232,8 @@ main(int argc, char *argv[])
 			errx(1, "pipe closed");
 
 		while (!done) {
-			if ((n = imsg_get(ibuf, &imsg)) == -1)
-				errx(1, "imsg_get error");
+			if ((n = imsgbuf_get(ibuf, &imsg)) == -1)
+				errx(1, "imsgbuf_get error");
 			if (n == 0)
 				break;
 			switch (res->action) {