3623 kstat must accept partial stat specification

*** 31,41 ****
   * This is a reimplementation of the perl kstat command originally found
   * under usr/src/cmd/kstat/kstat.pl
   *
   * Incompatibilities:
   *      - perl regular expressions replaced with extended REs bracketed by '/'
-  *      - options checking is stricter
   *
   * Flags added:
   *      -C      similar to the -p option but value is separated by a colon
   *      -h      display help
   *      -j      json format
--- 31,40 ----
*** 253,268 ****
                                                  assert(B_FALSE);
                                          }
                                  }
                          }
  
-                         if (m < 4) {
-                                 free(uselector);
-                                 usage();
-                                 exit(2);
-                         }
- 
                          uselflg = B_TRUE;
                          list_insert_tail(&selector_list, uselector);
                  } else {
                          if (tmp < 1) {
                                  if (n == 0) {
--- 252,261 ----
*** 295,305 ****
           * Check if we founded a named selector on the cmdline.
           */
          if (uselflg) {
                  if (nselflg) {
                          (void) fprintf(stderr, gettext(
!                             "module:instance:name:statistic and "
                              "-m -i -n -s are mutually exclusive"));
                          usage();
                          exit(2);
                  } else {
                          free(nselector);
--- 288,298 ----
           * Check if we founded a named selector on the cmdline.
           */
          if (uselflg) {
                  if (nselflg) {
                          (void) fprintf(stderr, gettext(
!                             "[module[:instance[:name[:statistic]]]] and "
                              "-m -i -n -s are mutually exclusive"));
                          usage();
                          exit(2);
                  } else {
                          free(nselector);
*** 360,370 ****
              "Usage:\n"
              "kstat [ -Cjlpq ] [ -T d|u ] [ -c class ]\n"
              "      [ -m module ] [ -i instance ] [ -n name ] [ -s statistic ]\n"
              "      [ interval [ count ] ]\n"
              "kstat [ -Cjlpq ] [ -T d|u ] [ -c class ]\n"
!             "      [ module:instance:name:statistic ... ]\n"
              "      [ interval [ count ] ]\n"));
  }
  
  /*
   * Sort compare function.
--- 353,363 ----
              "Usage:\n"
              "kstat [ -Cjlpq ] [ -T d|u ] [ -c class ]\n"
              "      [ -m module ] [ -i instance ] [ -n name ] [ -s statistic ]\n"
              "      [ interval [ count ] ]\n"
              "kstat [ -Cjlpq ] [ -T d|u ] [ -c class ]\n"
!             "      [ module[:instance[:name[:statistic]]] ... ]\n"
              "      [ interval [ count ] ]\n"));
  }
  
  /*
   * Sort compare function.