Fix for typo (LICENCE) and suggestion for https links

[tinko92]

Hi, this PR is intentionally split into two commits in case I've overlooked some reason that speaks against the second one. The first one fixes some links that pointed to http://www.boost.org/LICENCE_1_0.txt rather than http://www.boost.org/LICENSE_1_0.txt which causes a 404 when clicked in the online documentation or copied into the URL field. The second one changes all occurrences of that link to https, which saves a redirection when clicked.

[codecov]

Codecov Report

Merging #103 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop    #103   +/-   ##
=======================================
  Coverage     81.3%   81.3%           
=======================================
  Files           15      15           
  Lines          642     642           
  Branches       151     151           
=======================================
  Hits           522     522           
  Misses          18      18           
  Partials       102     102

Impacted Files	Coverage Δ
include/boost/uuid/detail/md5.hpp	88.19% <ø> (ø)	⬆️
include/boost/uuid/uuid.hpp	100% <ø> (ø)	⬆️
include/boost/uuid/entropy_error.hpp	100% <ø> (ø)	⬆️
...de/boost/uuid/detail/random_provider_getrandom.ipp	78.57% <ø> (ø)	⬆️
include/boost/uuid/nil_generator.hpp	100% <ø> (ø)	⬆️
include/boost/uuid/uuid_hash.hpp	100% <ø> (ø)	⬆️
include/boost/uuid/uuid_io.hpp	52.27% <ø> (ø)	⬆️
include/boost/uuid/detail/uuid_x86.ipp	100% <ø> (ø)	⬆️
include/boost/uuid/basic_name_generator.hpp	67.92% <ø> (ø)	⬆️
include/boost/uuid/string_generator.hpp	69.11% <ø> (ø)	⬆️
... and 5 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 638f72a...3d43ef4. Read the comment docs.