manual: Update URLs which give 301.
authorAndre Noll <maan@tuebingen.mpg.de>
Sat, 26 Aug 2017 18:40:08 +0000 (20:40 +0200)
committerAndre Noll <maan@tuebingen.mpg.de>
Sat, 26 Aug 2017 19:12:05 +0000 (21:12 +0200)
commit8c3b190d0d80b5416e62b0c6383531bcdd777e6c
treeed803289113c0c85cfa1333ffbcbd77f51a7e52c
parentfdd42bed6f2a0b50d20cbbcc002ff1f8567279c4
manual: Update URLs which give 301.

The link to the discount page is missing a trailing slash. For all
others the URL is redirected permanently to the https variant.

Found by the w3m link checker.
web/manual.md