There should be a reasonable default timeout when searching a server via LDAP for CMS certificates.

Problem observed with, Gpg4win 3.0.0 on Windows 10 DE Outlook 2016
Freshly installed as DE. Imported some seckey material.

Entered via kleo -> settings -> dirmngr
ca.intevation.de ldap o=Intevation GmbH, c=de
Ldap timeout by default was 0:00
-> Searches do not terminate and there is no response. (ca.intevation.de was somehow unresponsive during this test).
if you press "close" on the search window, something hangs in the background
-> Makes the rest of application partly unusable

[normal] change default to a reasonable time out, e.g. 0:10