In roughly descending order of significance:
- Enable READLINE OPTION by default
- Install LDIF and schema files if LDAP is enabled
- Add READLINE_PORT OPTION to use devel/readline port
- Respect DOCS and EXAMPLES global OPTIONS
- Use PORTDOCS and PORTEXAMPLES
- Describe CMD_LINE_EDITING group
- Adopt OPTION helper macros
- Pet portlint (trim newline, tighten CONFLICTS, NLS option for gettext, regenerate patches)
- A few other minor simplifications to reduce repetition and improve robustness and readability