Add ssh to zsh prompt; complete syn match.

Add:
	zsh/prompt.zsh
		-display username@hostname in zsh prompt when ssh'd into a terminal.

	vimrc-after
		-finalize syntax matching for mathematical, logical, and bitwise
		operations.

Fix:
	vimrc
		-remove "syntax enable" that preceded the colorscheme configuration and
		forced Vim to reread system-wide configuration files, consequently
		overriding my personal settings.