daemon: consolidate variable declarations and initializaions

• improve readability by breaking apart single-line multi-variable declarations
• initialize simple variables at declaration site
• move other top-level variable initializations closer declarations to avoid potential UB and unclutter the use-site.

Reviewed by: kevans
Pull Request: https://github.com/freebsd/freebsd-src/pull/669

(cherry picked from commit e745dc2287ac4844c1a21aaa31d0bc3dad6b1b06)