* include/libwget.h.in: Adjust wget_random() return type to int
* libwget/random.c (libwget/random.c): Use initstate_r() for seeding,
(wget_srandom): Use initstate_r() for seeding
* docs/Makefile.am: Add wget_random and wget_srandom to docs
* include/libwget.h.in: Add wget_random and wget_srandom
* libwget/Makefile.am: Add random.c
* libwget/http.c: Use wget_random()
* libwget/random.c: New file with wget_random and wget_srandom
* src/options.c: Remove call to srandom()