MINOR: vars: rename vars_init() to vars_init_head()

The vars_init() name is particularly confusing as it does not initialize
the variables code but the head of a list of variables passed in
arguments. And we'll soon need to have proper initialization code, so
let's rename it now.

include/haproxy/vars.h

@@ -29,7 +29,7 @@
 
 extern struct vars proc_vars;
 
-void vars_init(struct vars *vars, enum vars_scope scope);
+void vars_init_head(struct vars *vars, enum vars_scope scope);
 void var_accounting_diff(struct vars *vars, struct session *sess, struct stream *strm, int size);
 unsigned int var_clear(struct var *var);
 void vars_prune(struct vars *vars, struct session *sess, struct stream *strm);

src/haproxy.c

@@ -1529,7 +1529,7 @@ static void init(int argc, char **argv)
 	hlua_init();
 
 	/* Initialize process vars */
-	vars_init(&proc_vars, SCOPE_PROC);
+	vars_init_head(&proc_vars, SCOPE_PROC);
 
 	global.tune.options |= GTUNE_USE_SELECT;  /* select() is always available */
 #if defined(USE_POLL)

src/http_ana.c

@@ -2967,7 +2967,7 @@ int http_eval_after_res_rules(struct stream *s)
 	if (s->vars_reqres.scope != SCOPE_RES) {
 		if (!LIST_ISEMPTY(&s->vars_reqres.head))
 			vars_prune(&s->vars_reqres, s->sess, s);
-		vars_init(&s->vars_reqres, SCOPE_RES);
+		vars_init_head(&s->vars_reqres, SCOPE_RES);
 	}
 
 	ret = http_res_get_intercept_rule(s->be, &s->be->http_after_res_rules, s);
@@ -5095,8 +5095,8 @@ struct http_txn *http_create_txn(struct stream *s)
 
 	txn->auth.method = HTTP_AUTH_UNKNOWN;
 
-	vars_init(&s->vars_txn,    SCOPE_TXN);
-	vars_init(&s->vars_reqres, SCOPE_REQ);
+	vars_init_head(&s->vars_txn,    SCOPE_TXN);
+	vars_init_head(&s->vars_reqres, SCOPE_REQ);
 
 	return txn;
 }

src/session.c

@@ -47,7 +47,7 @@ struct session *session_new(struct proxy *fe, struct listener *li, enum obj_type
 		sess->accept_date = date; /* user-visible date for logging */
 		sess->tv_accept   = now;  /* corrected date for internal use */
 		memset(sess->stkctr, 0, sizeof(sess->stkctr));
-		vars_init(&sess->vars, SCOPE_SESS);
+		vars_init_head(&sess->vars, SCOPE_SESS);
 		sess->task = NULL;
 		sess->t_handshake = -1; /* handshake not done yet */
 		sess->t_idle = -1;

src/stream.c

@@ -451,8 +451,8 @@ struct stream *stream_new(struct session *sess, enum obj_type *origin, struct bu
 	/* Initialise all the variables contexts even if not used.
 	 * This permits to prune these contexts without errors.
 	 */
-	vars_init(&s->vars_txn,    SCOPE_TXN);
-	vars_init(&s->vars_reqres, SCOPE_REQ);
+	vars_init_head(&s->vars_txn,    SCOPE_TXN);
+	vars_init_head(&s->vars_reqres, SCOPE_REQ);
 
 	/* this part should be common with other protocols */
 	if (si_reset(&s->si[0]) < 0)
@@ -2201,7 +2201,7 @@ struct task *process_stream(struct task *t, void *context, unsigned int state)
 		if (s->vars_reqres.scope != SCOPE_RES) {
 			if (!LIST_ISEMPTY(&s->vars_reqres.head))
 				vars_prune(&s->vars_reqres, s->sess, s);
-			vars_init(&s->vars_reqres, SCOPE_RES);
+			vars_init_head(&s->vars_reqres, SCOPE_RES);
 		}
 
 		do {

src/tcpcheck.c

@@ -2118,7 +2118,7 @@ int tcpcheck_main(struct check *check)
 			set_server_check_status(check, HCHK_STATUS_SOCKERR, trash.area);
 			goto out_end_tcpcheck;
 		}
-		vars_init(&check->vars, SCOPE_CHECK);
+		vars_init_head(&check->vars, SCOPE_CHECK);
 		rule = LIST_NEXT(check->tcpcheck_rules->list, typeof(rule), list);
 
 		/* Preset tcp-check variables */

src/vars.c

@@ -196,8 +196,8 @@ void vars_prune_per_sess(struct vars *vars)
 	_HA_ATOMIC_SUB(&var_global_size, size);
 }
 
-/* This function init a list of variables. */
-void vars_init(struct vars *vars, enum vars_scope scope)
+/* This function initializes a variables list head */
+void vars_init_head(struct vars *vars, enum vars_scope scope)
 {
 	LIST_INIT(&vars->head);
 	vars->scope = scope;