Rename timeval_plus_msec to timeval_add_msec.

Stress the asymmetry with timeval_add_msec, which is purely functional.

babeld.c

@@ -818,7 +818,7 @@ schedule_neighbours_check(int msecs, int override)
 {
     struct timeval timeout;
 
-    timeval_plus_msec(&timeout, &now, roughly(msecs * 3 / 2));
+    timeval_add_msec(&timeout, &now, roughly(msecs * 3 / 2));
     if(override)
         check_neighbours_timeout = timeout;
     else

neighbour.c

@@ -121,7 +121,7 @@ update_neighbour(struct neighbour *neigh, int hello, int hello_interval)
             (neigh->hello_interval * 10);
         if(missed_hellos <= 0)
             return rc;
-        timeval_plus_msec(&neigh->hello_time, &neigh->hello_time,
+        timeval_add_msec(&neigh->hello_time, &neigh->hello_time,
                           missed_hellos * neigh->hello_interval * 10);
     } else {
         if(neigh->hello_seqno >= 0 && neigh->reach > 0) {

network.c

@@ -147,7 +147,7 @@ update_jitter(struct network *net, int urgent)
 void
 delay_jitter(struct timeval *timeout, int msecs)
 {
-    timeval_plus_msec(timeout, &now, roughly(msecs));
+    timeval_add_msec(timeout, &now, roughly(msecs));
 }
 
 static int

resend.c

@@ -138,7 +138,7 @@ record_resend(int kind, const unsigned char *prefix, unsigned char plen,
 
     if(resend->delay) {
         struct timeval timeout;
-        timeval_plus_msec(&timeout, &resend->time, resend->delay);
+        timeval_add_msec(&timeout, &resend->time, resend->delay);
         timeval_min(&resend_time, &timeout);
     }
     return 1;
@@ -268,7 +268,7 @@ recompute_resend_time()
     while(request) {
         if(!resend_expired(request) && request->delay > 0 && request->max > 0) {
             struct timeval timeout;
-            timeval_plus_msec(&timeout, &request->time, request->delay);
+            timeval_add_msec(&timeout, &request->time, request->delay);
             timeval_min(&resend, &timeout);
         }
         request = request->next;
@@ -286,7 +286,7 @@ do_resend()
     while(resend) {
         if(!resend_expired(resend) && resend->delay > 0 && resend->max > 0) {
             struct timeval timeout;
-            timeval_plus_msec(&timeout, &resend->time, resend->delay);
+            timeval_add_msec(&timeout, &resend->time, resend->delay);
             if(timeval_compare(&now, &timeout) >= 0) {
                 switch(resend->kind) {
                 case RESEND_REQUEST:

util.c

@@ -77,7 +77,7 @@ timeval_minus_msec(const struct timeval *s1, const struct timeval *s2)
 }
 
 void
-timeval_plus_msec(struct timeval *d, const struct timeval *s, int msecs)
+timeval_add_msec(struct timeval *d, const struct timeval *s, int msecs)
 {
     int usecs;
     d->tv_sec = s->tv_sec + msecs / 1000;

util.h

@@ -71,7 +71,7 @@ void timeval_minus(struct timeval *d,
                    const struct timeval *s1, const struct timeval *s2);
 unsigned timeval_minus_msec(const struct timeval *s1, const struct timeval *s2)
     ATTRIBUTE ((pure));
-void timeval_plus_msec(struct timeval *d,
+void timeval_add_msec(struct timeval *d,
                       const struct timeval *s, int msecs);
 int timeval_compare(const struct timeval *s1, const struct timeval *s2)
     ATTRIBUTE ((pure));