Macros starting with `a' in kern

• ADDR_MATCH kern/mach_net.c:437
• ADD_TO_ZONE kern/zalloc.c:87
• ADD_TVALSPEC_NSEC kern/clock.h:52
• assert kern/assert.h:71
• assert_static kern/assert.h:73
• ast_context kern/ast.h:139
• ast_needed kern/ast.h:123
• astoff kern/ast.h:111
• aston kern/ast.h:110
• ast_propagate kern/ast.h:137