Lazy-load leiningen.core.ssl.
Update bundled clojars.pem.

Extracted with: openssl s_client -connect clojars.org:443
Don't load clojars cert in default project map.
Don't add all files in git vcs commit. Fixes #1558.
Put a newline in between META-INF/services/ entries.

Refs #1561.
Document how to use bundled clojars.pem in case of CA problems.

Refs #1053.
Write pom.properties in :prep-tasks, not during jar creation.
Document pom.properties.

[ci skip]
Switch order of args in git vcs commit.

Refs #1558

[ci skip]
Update NEWS for 2.4.1.
Move make-project-properties to leiningen.core.project.
Release 2.4.1
Bump version to 2.4.2-SNAPSHOT.
Fix write-pom-properties to work when outside project dir.
Fix leiningen.core.ssl lazy-load.
NEWS for 2.4.2.
Release 2.4.2
Bump version to 2.4.3-SNAPSHOT.
Fix bad eval test.
Update new key expiry dates.