tidy-up: miscellaneous

- avoid "will" in builds scripts, scripts folder, curl_easy_ssls_export.md,
  and few other files.
- badwords: add "initialise", "nul terminated", "thread safety" and
  variations.
- prefer "null-terminat", where missing (two places).
- fix "null-terminat*" missing dash.
- hostip: merge two `#if` blocks.
- tool_doswin: fix comment
  Spotted by GitHub Code Quality
  Follow-up to 9a2663322c #17572
- fix stray spaces and newlines.

Closes #21638

src/tool_cfgable.c

@@ -219,7 +219,7 @@ void config_free(struct OperationConfig *config)
  * round to verify them.
  *
  * The main point is to make sure that what is returned is different than what
- * the regular memory functions return so that mixup will trigger problems.
+ * the regular memory functions return so that mixup does trigger problems.
  *
  * This test setup currently only works when building with a *shared* libcurl
  * and not static, as in the latter case the tool and the library share some of

src/tool_doswin.c

@@ -804,7 +804,7 @@ curl_socket_t win32_stdin_read_thread(void)
       break;
     }
 
-    /* Bind to any available loopback port */
+    /* Retrieve the assigned loopback port/address */
     if(getsockname(tdata->socket_l, (struct sockaddr *)&selfaddr, &socksize)) {
       errorf("getsockname error: %d", SOCKERRNO);
       break;

src/tool_formparse.c

@@ -652,8 +652,7 @@ static void param_encoder(char **ptr, char **endct, char **pencoder,
  * @param str       Pointer to the current position in the input string.
  *                  Updated to point at the delimiter or terminator that
  *                  ended the parsed part.
- * @param pdata     Pointer to a char * that will receive the primary data
- *                  word.
+ * @param pdata     Pointer to a char * that receives the primary data word.
  * @param ptype     [out] Optional. Receives the extracted 'type=' value.
  * @param pfilename [out] Optional. Receives the extracted 'filename=' value.
  * @param pencoder  [out] Optional. Receives the extracted 'encoder=' value.

src/var.c

@@ -355,7 +355,7 @@ static ParameterError addvariable(const char *name,
   p = curlx_calloc(1, sizeof(struct tool_var) + nlen);
   if(p) {
     memcpy(p->name, name, nlen);
-    /* the null termination byte is already present from above */
+    /* the null-termination byte is already present from above */
 
     p->content = contalloc ? content : curlx_memdup0(content, clen);
     if(p->content) {