net/boinc-client: Update 8.0.2 => 8.2.4

Changelogs:

• https://github.com/BOINC/boinc/releases/tag/client_release%2F8.0%2F8.0.3
• https://github.com/BOINC/boinc/releases/tag/client_release%2F8.0%2F8.0.4
• https://github.com/BOINC/boinc/releases/tag/client_release%2F8.2%2F8.2.0
• https://github.com/BOINC/boinc/releases/tag/client_release%2F8.2%2F8.2.1
• https://github.com/BOINC/boinc/releases/tag/client_release%2F8.2%2F8.2.2
• https://github.com/BOINC/boinc/releases/tag/client_release%2F8.2%2F8.2.3
• https://github.com/BOINC/boinc/releases/tag/client_release%2F8.2%2F8.2.4
• https://github.com/BOINC/boinc/compare/client_release/8.0/8.0.2...client_release/8.2/8.2.4

• Apply portfmt(1)
• Fix options descriptions

Approved by: yuri@ (Mentor)

Differential Revision: https://reviews.freebsd.org/D52517