Thread safety fixes.

*** 8,18 ****
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   */
  
  /*
   * This file implements the 2008 newlocale and friends handling. It is
   * private to libc.
--- 8,18 ----
   * source.  A copy of the CDDL is also available via the Internet at
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
!  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   */
  
  /*
   * This file implements the 2008 newlocale and friends handling. It is
   * private to libc.
*** 48,63 ****
  struct locdata {
          char            l_lname[ENCODING_LEN+1];        /* locale name */
          void            *l_data[NLOCDATA];              /* storage area */
          void            *l_map;                         /* mapped file */
          size_t          l_map_len;
!         uint32_t        l_refcnt;
  };
  
  
  struct locale {
          struct locdata  *locdata[LC_ALL];
  
          /*
           * Convenience pointers.
           */
          const struct lc_ctype           *ctype;
--- 48,64 ----
  struct locdata {
          char            l_lname[ENCODING_LEN+1];        /* locale name */
          void            *l_data[NLOCDATA];              /* storage area */
          void            *l_map;                         /* mapped file */
          size_t          l_map_len;
!         struct locdata  *l_next;                        /* link cached list */
  };
  
  
  struct locale {
          struct locdata  *locdata[LC_ALL];
+         struct locale   *next;
  
          /*
           * Convenience pointers.
           */
          const struct lc_ctype           *ctype;
*** 79,90 ****
          struct lconv    lconv;
  };
  
  
  struct locdata *__locdata_alloc(const char *, size_t);
! struct locdata *__locdata_hold(struct locdata *);
! void __locdata_release(struct locdata *);
  struct locdata *__locdata_get_cache(int, const char *);
  void __locdata_set_cache(int, struct locdata *);
  
  struct locdata *__lc_numeric_load(const char *name);
  struct locdata *__lc_monetary_load(const char *name);
--- 80,90 ----
          struct lconv    lconv;
  };
  
  
  struct locdata *__locdata_alloc(const char *, size_t);
! void __locdata_free(struct locdata *);
  struct locdata *__locdata_get_cache(int, const char *);
  void __locdata_set_cache(int, struct locdata *);
  
  struct locdata *__lc_numeric_load(const char *name);
  struct locdata *__lc_monetary_load(const char *name);