pgAdmin 4 commit: Update links in docs to https where possible,and fix

Update links in docs to https where possible, and fix a couple of broken/out of date ones.

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=25b8a909b138046691ed1a5add1c2cc53f621ea2

Modified Files
--------------
docs/en_US/add_restore_point_dialog.rst | 2 +-
docs/en_US/build_code_snippet.py        | 2 +-
docs/en_US/collation_dialog.rst         | 2 +-
docs/en_US/column_dialog.rst            | 2 +-
docs/en_US/connect_error.rst            | 4 ++--
docs/en_US/function_dialog.rst          | 2 +-
docs/en_US/grant_wizard.rst             | 2 +-
docs/en_US/licence.rst                  | 2 +-
docs/en_US/pgagent_install.rst          | 2 +-
docs/en_US/pgagent_jobs.rst             | 2 +-
docs/en_US/restore_dialog.rst           | 4 ++--
docs/en_US/server_dialog.rst            | 6 +++---
docs/en_US/using_pgagent.rst            | 2 +-
13 files changed, 17 insertions(+), 17 deletions(-)