tidy-up: drop parenthesis around return values

Closes #15979

lib/http.c

@@ -1685,7 +1685,7 @@ static CURLcode http_target(struct Curl_easy *data,
       data->set.str[STRING_TARGET] : url);
     free(url);
     if(result)
-      return (result);
+      return result;
 
     if(strcasecompare("ftp", data->state.up.scheme)) {
       if(data->set.proxy_transfer_mode) {

lib/inet_ntop.c

@@ -75,7 +75,7 @@ static char *inet_ntop4(const unsigned char *src, char *dst, size_t size)
   len = strlen(tmp);
   if(len == 0 || len >= size) {
     errno = ENOSPC;
-    return (NULL);
+    return NULL;
   }
   strcpy(dst, tmp);
   return dst;
@@ -154,7 +154,7 @@ static char *inet_ntop6(const unsigned char *src, char *dst, size_t size)
         (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) {
       if(!inet_ntop4(src + 12, tp, sizeof(tmp) - (tp - tmp))) {
         errno = ENOSPC;
-        return (NULL);
+        return NULL;
       }
       tp += strlen(tp);
       break;
@@ -172,7 +172,7 @@ static char *inet_ntop6(const unsigned char *src, char *dst, size_t size)
    */
   if((size_t)(tp - tmp) > size) {
     errno = ENOSPC;
-    return (NULL);
+    return NULL;
   }
   strcpy(dst, tmp);
   return dst;

lib/inet_pton.c

@@ -76,12 +76,12 @@ Curl_inet_pton(int af, const char *src, void *dst)
 {
   switch(af) {
   case AF_INET:
-    return (inet_pton4(src, (unsigned char *)dst));
+    return inet_pton4(src, (unsigned char *)dst);
   case AF_INET6:
-    return (inet_pton6(src, (unsigned char *)dst));
+    return inet_pton6(src, (unsigned char *)dst);
   default:
     errno = EAFNOSUPPORT;
-    return (-1);
+    return -1;
   }
   /* NOTREACHED */
 }
@@ -116,29 +116,29 @@ inet_pton4(const char *src, unsigned char *dst)
                          (unsigned int)(pch - digits);
 
       if(saw_digit && *tp == 0)
-        return (0);
+        return 0;
       if(val > 255)
-        return (0);
+        return 0;
       *tp = (unsigned char)val;
       if(!saw_digit) {
         if(++octets > 4)
-          return (0);
+          return 0;
         saw_digit = 1;
       }
     }
     else if(ch == '.' && saw_digit) {
       if(octets == 4)
-        return (0);
+        return 0;
       *++tp = 0;
       saw_digit = 0;
     }
     else
-      return (0);
+      return 0;
   }
   if(octets < 4)
-    return (0);
+    return 0;
   memcpy(dst, tmp, INADDRSZ);
-  return (1);
+  return 1;
 }
 
 /* int
@@ -170,7 +170,7 @@ inet_pton6(const char *src, unsigned char *dst)
   /* Leading :: requires some special handling. */
   if(*src == ':')
     if(*++src != ':')
-      return (0);
+      return 0;
   curtok = src;
   saw_xdigit = 0;
   val = 0;
@@ -185,19 +185,19 @@ inet_pton6(const char *src, unsigned char *dst)
       val <<= 4;
       val |= (pch - xdigits);
       if(++saw_xdigit > 4)
-        return (0);
+        return 0;
       continue;
     }
     if(ch == ':') {
       curtok = src;
       if(!saw_xdigit) {
         if(colonp)
-          return (0);
+          return 0;
         colonp = tp;
         continue;
       }
       if(tp + INT16SZ > endp)
-        return (0);
+        return 0;
       *tp++ = (unsigned char) ((val >> 8) & 0xff);
       *tp++ = (unsigned char) (val & 0xff);
       saw_xdigit = 0;
@@ -210,11 +210,11 @@ inet_pton6(const char *src, unsigned char *dst)
       saw_xdigit = 0;
       break;    /* '\0' was seen by inet_pton4(). */
     }
-    return (0);
+    return 0;
   }
   if(saw_xdigit) {
     if(tp + INT16SZ > endp)
-      return (0);
+      return 0;
     *tp++ = (unsigned char) ((val >> 8) & 0xff);
     *tp++ = (unsigned char) (val & 0xff);
   }
@@ -227,7 +227,7 @@ inet_pton6(const char *src, unsigned char *dst)
     ssize_t i;
 
     if(tp == endp)
-      return (0);
+      return 0;
     for(i = 1; i <= n; i++) {
       *(endp - i) = *(colonp + n - i);
       *(colonp + n - i) = 0;
@@ -235,9 +235,9 @@ inet_pton6(const char *src, unsigned char *dst)
     tp = endp;
   }
   if(tp != endp)
-    return (0);
+    return 0;
   memcpy(dst, tmp, IN6ADDRSZ);
-  return (1);
+  return 1;
 }
 
 #endif /* HAVE_INET_PTON */

lib/ldap.c

@@ -1087,7 +1087,7 @@ static int _ldap_url_parse(struct Curl_easy *data,
     ludp = NULL;
   }
   *ludpp = ludp;
-  return (rc);
+  return rc;
 }
 
 static void _ldap_free_urldesc(LDAPURLDesc *ludp)