tool_getparam: refactored, simplified

- add dedicated option functions for bools/none/strings
- simplify clearing (some) arguments, use '*' instead of ' '
- scripts/top-complexity: remove getparameter from whitelist
- handle --help separately
- getstr and getstrn do not allow a NULL input
- improve the ;auto check, it needs to be trailing
- add toggle bit helper function
- unify an error message for bad --no- use
- introduce generic handling of deprecated options: ARG_DEPR
- handle --no- prefix on more booleans:

    --cert-status
    --doh-cert-status
    --false-start
    --mptcp
    --ssl-no-revoke
    --ssl-revoke-best-effort
    --tcp-fastopen

Closes #17448

scripts/top-complexity

@@ -75,7 +75,7 @@ my @output=`$cmd`;
 
 # these functions can have these scores, but not higher
 my %whitelist = (
-    'getparameter' => 142
+
     );
 
 # functions with complexity above this level causes the function to return error

src/tool_cfgable.h

@@ -218,7 +218,7 @@ struct OperationConfig {
   long retry_delay;         /* delay between retries (in seconds) */
   long retry_maxtime;       /* maximum time to keep retrying */
 
-  long mime_options;        /* Mime option flags. */
+  unsigned long mime_options; /* Mime option flags. */
   long tftp_blksize;        /* TFTP BLKSIZE option */
   long alivetime;           /* keepalive-time */
   long alivecnt;            /* keepalive-cnt */

src/tool_getparam.h

@@ -317,6 +317,8 @@ typedef enum {
 #define ARG_TYPEMASK 0x03
 #define ARGTYPE(x) ((x) & ARG_TYPEMASK)
 
+#define ARG_DEPR 0x10 /* deprecated option */
+#define ARG_CLEAR 0x20 /* clear cmdline argument */
 #define ARG_TLS 0x40 /* requires TLS support */
 #define ARG_NO 0x80 /* set if the option is documented as --no-* */
 
@@ -347,7 +349,6 @@ typedef enum {
   PARAM_NEXT_OPERATION,
   PARAM_NO_PREFIX,
   PARAM_NUMBER_TOO_LARGE,
-  PARAM_NO_NOT_BOOLEAN,
   PARAM_CONTDISP_RESUME_FROM, /* --continue-at and --remote-header-name */
   PARAM_READ_ERROR,
   PARAM_EXPAND_ERROR, /* --expand problem */
@@ -363,8 +364,6 @@ const struct LongShort *findlongopt(const char *opt);
 const struct LongShort *findshortopt(char letter);
 
 ParameterError getparameter(const char *flag, const char *nextarg,
-                            argv_item_t cleararg1,
-                            argv_item_t cleararg2,
                             bool *usedarg,
                             struct GlobalConfig *global,
                             struct OperationConfig *operation);

src/tool_helpers.c

@@ -62,8 +62,6 @@ const char *param2text(ParameterError error)
     return "the given option cannot be reversed with a --no- prefix";
   case PARAM_NUMBER_TOO_LARGE:
     return "too large number";
-  case PARAM_NO_NOT_BOOLEAN:
-    return "used '--no-' for option that is not a boolean";
   case PARAM_CONTDISP_RESUME_FROM:
     return "--continue-at and --remote-header-name cannot be combined";
   case PARAM_READ_ERROR:

src/tool_parsecfg.c

@@ -172,8 +172,7 @@ int parseconfig(const char *filename, struct GlobalConfig *global)
 #ifdef DEBUG_CONFIG
       fprintf(tool_stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
 #endif
-      res = getparameter(option, param, NULL, NULL,
-                         &usedarg, global, operation);
+      res = getparameter(option, param, &usedarg, global, operation);
       operation = global->last;
 
       if(!res && param && *param && !usedarg)