www/groupoffice: Update from 6.2.41 to 6.2.48

[joneum]

Summary

• www/groupoffice: Update from 6.2.41 to 6.2.48
• Changelog: https://sourceforge.net/p/group-office/code/HEAD/tree/branches/groupoffice-6.2/www/CHANGELOG.TXT

Test Plan

:~/dev/ports/www/groupoffice % portlint -AC
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
WARN: Makefile: "RESTRICTED" found. do not forget to update ports/LEGAL.
0 fatal errors and 2 warnings found.

poudriere testport:

10amd64
10i386
11amd64
11i386
12.0-CURRENT r320266 amd64
12.0-CURRENT r320266 i386