Fixup pkgbase in more places in py3-srht

Update py3-srht pkgbase

Update py3-srht archive URL

Add py3-scmsrht package, update py3-srht

Update man.sr.ht.post-upgrade

Also moves alembic dependency to py3-srht

Add py3-misaka to core.sr.ht dependencies

Add py3-pygments to py3-srht

Add py3-beautifulsoup4 to py3-srht deps

Update bootstrap version used for core.sr.ht

Add py3-pygfm to py3-srht deps

Update py3-srht upstream URL

Package meta.sr.ht

Set all pkgrels to zero

Move into subdir for abuild reasons