make: use the more modern wchar routines, not widec.h

*** 34,45 ****
  #include <vroot/vroot.h>        /* pathpt */
  #include <sys/time.h>           /* timestruc_t */
  #include <errno.h>              /* errno */
  
  #include <wctype.h>
- #include <widec.h>
- 
  
  /*
   * A type and some utilities for boolean values
   */
  
--- 34,43 ----
*** 156,167 ****
  #define ALLOC_WC(x)             ((wchar_t *)getmem((x) * SIZEOFWCHAR_T))
  #define FIND_LENGTH             -1
  #define GETNAME(a,b)            getname_fn((a), (b), false)
  #define IS_EQUAL(a,b)           (!strcmp((a), (b)))
  #define IS_EQUALN(a,b,n)        (!strncmp((a), (b), (n)))
! #define IS_WEQUAL(a,b)          (!wscmp((a), (b)))
! #define IS_WEQUALN(a,b,n)       (!wsncmp((a), (b), (n)))
  #define MBLEN(a)                mblen((a), MB_LEN_MAX)
  #define MBSTOWCS(a,b)           (void) mbstowcs_with_check((a), (b), MAXPATHLEN)
  #define MBTOWC(a,b)             mbtowc((a), (b), MB_LEN_MAX)
  #define SIZEOFWCHAR_T           (sizeof (wchar_t))
  #define VSIZEOF(v)              (sizeof (v) / sizeof ((v)[0]))
--- 154,165 ----
  #define ALLOC_WC(x)             ((wchar_t *)getmem((x) * SIZEOFWCHAR_T))
  #define FIND_LENGTH             -1
  #define GETNAME(a,b)            getname_fn((a), (b), false)
  #define IS_EQUAL(a,b)           (!strcmp((a), (b)))
  #define IS_EQUALN(a,b,n)        (!strncmp((a), (b), (n)))
! #define IS_WEQUAL(a,b)          (!wcscmp((a), (b)))
! #define IS_WEQUALN(a,b,n)       (!wcsncmp((a), (b), (n)))
  #define MBLEN(a)                mblen((a), MB_LEN_MAX)
  #define MBSTOWCS(a,b)           (void) mbstowcs_with_check((a), (b), MAXPATHLEN)
  #define MBTOWC(a,b)             mbtowc((a), (b), MB_LEN_MAX)
  #define SIZEOFWCHAR_T           (sizeof (wchar_t))
  #define VSIZEOF(v)              (sizeof (v) / sizeof ((v)[0]))
*** 242,252 ****
                  ~Wstring();
  
                  void init(struct _Name * name);
                  void init(wchar_t * name, unsigned length);
                  unsigned length() {
!                         return wslen(string.buffer.start);
                  };
                  void append_to_str(struct _String * str, unsigned off, unsigned length);
  
                  wchar_t * get_string() {
                          return string.buffer.start;
--- 240,250 ----
                  ~Wstring();
  
                  void init(struct _Name * name);
                  void init(wchar_t * name, unsigned length);
                  unsigned length() {
!                         return wcslen(string.buffer.start);
                  };
                  void append_to_str(struct _String * str, unsigned off, unsigned length);
  
                  wchar_t * get_string() {
                          return string.buffer.start;