Currently homedir specified with and without trailing slash will lead to duplicate agents being run, which causes issues e.g with smartcard / scdaemon locking. I'm seeing this in particular when using git , which results in need to pull and re-insert smartcard as it shifts between the agents.

Steps to reproduce:
kristianf@ares ~ $ rm -rf /run/user/1000/gnupg/
kristianf@ares ~ $ export GNUPGHOME=$HOME/.gnupg
kristianf@ares ~ $ gpg-connect-agent /bye
gpg-connect-agent: no running gpg-agent - starting '/usr/bin/gpg-agent'
gpg-connect-agent: waiting for the agent to come up ... (5s)
gpg-connect-agent: connection to agent established
kristianf@ares ~ $ export GNUPGHOME=$HOME/.gnupg/
kristianf@ares ~ $ gpg-connect-agent /bye
gpg-connect-agent: no running gpg-agent - starting '/usr/bin/gpg-agent'
gpg-connect-agent: waiting for the agent to come up ... (5s)
gpg-connect-agent: connection to agent established
kristianf@ares ~ $ ls /run/user/1000/gnupg/
d.kb3e7bjorwnzw8nu7ky1hcqi S.gpg-agent.browser S.gpg-agent.ssh
S.gpg-agent S.gpg-agent.extra
kristianf@ares ~ $
kristianf@ares ~ $ ps aux | grep gpg-agent
kristia+ 6491 0.0 0.0 91616 432 ? Ss 16:03 0:00 gpg-agent --homedir /home/kristianf/.gnupg --use-standard-socket --daemon
kristia+ 6496 0.0 0.0 91616 500 ? Ss 16:04 0:00 gpg-agent --homedir /home/kristianf/.gnupg/ --use-standard-socket --daemon

Expected behavior:
Since the paths are pointing at the same directory the same agent should be used (if this was a symbolic link, the same expectation would still hold, so comparison should be done on absolute path basis after unwinding of links)