Fix some issues reported by lintian

Fix some issues reported by lintian

• Use secure copyright file specification URI. (insecure-copyright-format-uri)
• Use secure URI in debian/watch. (debian-watch-uses-insecure-uri)
• Use secure URI in Homepage field. (homepage-field-uses-insecure-uri)
• Move source package lintian overrides to debian/source. (package-uses-deprecated-source-override-location)
• Bump debhelper from old 9 to 12. (package-uses-old-debhelper-compat-version)

This merge proposal was created automatically by the Janitor bot.

You can follow up to this merge proposal as you normally would.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/php-apcu-bc/034eda98-da34-468a-8156-bfc3a6018119.

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second .changes but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/74/80b92c26a19a9c4e62352954fced131659badd.debug

Files in first .changes but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/bf/572a6fb8616115675dbfeddff651ed413cdc16.debug

Control files of package php-apcu-bc: lines which differ (wdiff format)

• Homepage: http​://pecl.php.net/package/apcu_bc https​://pecl.php.net/package/apcu_bc

Control files of package php-apcu-bc-dbgsym: lines which differ (wdiff format)

• Build-Ids: bf572a6fb8616115675dbfeddff651ed413cdc16 7480b92c26a19a9c4e62352954fced131659badd

You can also view the diffoscope diff (unfiltered).