utility functions from BSD systems - development files

 This library provides some functions commonly available on BSD systems but
 not on others like GNU systems.
 .
 The currently provided functions are:
 .
  * _time32_to_time, _time_to_time32, _time64_to_time, _time_to_time64,
    _time_to_long, _long_to_time, _time_to_int, _int_to_time.
  * TIMEVAL_TO_TIMESPEC, TIMESPEC_TO_TIMEVAL.
  * MD5Data, MD5End, MD5File, MD5FileChunk, MD5Final, MD5Init, MD5Pad,
    MD5Transform, MD5Update.
  * arc4random, arc4random_addrandom, arc4random_buf, arc4random_stir,
    arc4random_uniform.
  * bsd_getopt.
  * be16dec, be32dec, be64dec, le16dec, le32dec, le64dec.
  * be16enc, be32enc, be64enc, le16enc, le32enc, le64enc.
  * bit_alloc, bit_decl, bit_clear, bit_ffc, bit_ffs, bit_nclear, bit_nset,
    bit_set, bitstr_size, bit_test.
  * closefrom.
  * expand_number, dehumanize_number, humanize_number, strtonum, fmtcheck.
  * explicit_bzero.
  * errc, verrc, vwarnc, warnc.
  * fgetln, fparseln, fgetwln, flopen, fpurge, funopen.
  * getbsize.
  * getmode, setmode, strmode,
  * getpeereid.
  * getprogname, setprogname.
  * heapsort, radixsort, mergesort, sradixsort.
  * nlist (ELF and a.out support).
  * pidfile_open, pidfile_write, pidfile_close, pidfile_remove.
  * readpassphrase.
  * reallocarray, reallocf.
  * setproctitle (initialized via libbsd-ctor or setproctitle_init).
  * sl_init, sl_add, sl_free, sl_find.
  * strlcpy, strlcat.
  * strnstr.
  * strnvis, strnunvis, strunvis, strunvisx, strvis, strvisx, unvis, vis.
  * timeradd, timersub, timerclear, timerisset, timercmp.
  * timespecadd, timespecsub, timespecclear, timespecisset, timespeccmp.
  * wcslcat, wcslcpy.
 .
 Also included are some queue macro definitions not present on includes
 from glibc.