This page https://www.digitalocean.com/community/tutorials/how-to-get-started-with-freebsd-10-1 suggests that on login, I'll be presented with the tcsh prompt. However, the droplet is defaulting to csh.
I can locate tcsh under /bin/tcsh but using setenv in my local .cshrc file doesn't cause this shell to be used on next login.
How and where can I set tcsh as my default please?
You are actually using tcsh, it is the improved version of csh:
shasum /bin/tcsh /bin/csh
74d4129fb4604baf8f272e9d4a4f1be80c89be5b /bin/tcsh
74d4129fb4604baf8f272e9d4a4f1be80c89be5b /bin/csh
Use vipw to edit /etc/master.passwd and select the shell you want
Alternative includes: https://www.freebsd.org/doc/handbook/shells.html
Editing master.passwd to use tcsh doesn't change to tcsh on next login:
freebsd:*:1001:1001::0:0:FreeBSD:/usr/home/freebsd:/bin/tcsh
What, exactly, has been configured in a non-default fashion (compared to a standard physical install) in a Digital Ocean FreeBSD droplet image, if anything?