pgsql: Update unicode.org URLs

Update unicode.org URLs

Use https, consistent host name, remove references to ftp.  Also
update the URLs for CLDR, which has moved from Trac to GitHub.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/bdb839cbdebe851c200b2c7c03aec7483573d631

Modified Files
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contrib/unaccent/generate_unaccent_rules.py  | 16 ++++++++--------
doc/src/sgml/acronyms.sgml                   |  2 +-
doc/src/sgml/charset.sgml                    |  8 ++++----
src/backend/utils/mb/Unicode/Makefile        | 14 +++++++-------
src/backend/utils/mb/Unicode/UCS_to_BIG5.pl  |  4 ++--
src/backend/utils/mb/Unicode/UCS_to_JOHAB.pl |  4 ++--
src/backend/utils/mb/Unicode/UCS_to_most.pl  |  4 ++--
src/common/unicode/Makefile                  |  2 +-
src/common/unicode_norm.c                    |  8 ++++----
9 files changed, 31 insertions(+), 31 deletions(-)