pidgin/pidgin

Fix some issues with the CredentialManager and CredentialProvider docs

2021-03-26, Gary Kramlich
f3fd62f8c831
Fix some issues with the CredentialManager and CredentialProvider docs

Testing Done:
Ran `ninja pidgin-doc` locally, verified the warnings we gone.

Reviewed at https://reviews.imfreedom.org/r/584/
libpurple/data/purple-url-handler.desktop.in
libpurple/protocols/null/nullprpl.c
pidgin/data/im.pidgin.Pidgin.desktop.in
sub/libpurple/data/purple-url-handler.desktop.in
sub/libpurple/protocols/null/nullprpl.c
sub/pidgin/data/im.pidgin.Pidgin.desktop.in