all: unify const names to snake_case

vlib/dl/dl_nix.c.v

@@ -3,9 +3,9 @@ module dl
 #include <dlfcn.h>
 
 pub const (
-	RTLD_NOW = C.RTLD_NOW
-	RTLD_LAZY = C.RTLD_LAZY
-	DL_EXT   = '.so'
+	rtld_now = C.RTLD_NOW
+	rtld_lazy = C.RTLD_LAZY
+	dl_ext   = '.so'
 )
 
 fn C.dlopen(filename charptr, flags int) voidptr

vlib/dl/dl_test.v

@@ -18,29 +18,29 @@ fn test_dl() {
 
 fn run_test_invalid_lib_linux() {
 	// ensure a not-existing dl won't be loaded
-	h := dl.open('not-existing-dynamic-link-library', dl.RTLD_NOW)
+	h := dl.open('not-existing-dynamic-link-library', dl.rtld_now)
 	assert h == 0
 }
 
 fn run_test_invalid_lib_windows() {
 	// ensure a not-existing dl won't be loaded
-	h := dl.open('not-existing-dynamic-link-library', dl.RTLD_NOW)
+	h := dl.open('not-existing-dynamic-link-library', dl.rtld_now)
 	assert h == 0
 }
 
 fn run_test_valid_lib_windows() {
-	h := dl.open('shell32', dl.RTLD_NOW)
+	h := dl.open('shell32', dl.rtld_now)
 	assert h != 0
 }
 
 fn run_test_invalid_sym_windows() {
-	h := dl.open('shell32', dl.RTLD_NOW)
+	h := dl.open('shell32', dl.rtld_now)
 	proc := dl.sym(h, 'CommandLineToArgvW2')
 	assert proc == 0
 }
 
 fn run_test_valid_sym_windows() {
-	h := dl.open('shell32', dl.RTLD_NOW)
+	h := dl.open('shell32', dl.rtld_now)
 	proc := dl.sym(h, 'CommandLineToArgvW')
 	assert proc != 0
 }

vlib/dl/dl_windows.c.v

@@ -1,9 +1,9 @@
 module dl
 
 pub const (
-	RTLD_NOW = 0
-	RTLD_LAZY = 0
-	DL_EXT   = '.dll'
+	rtld_now = 0
+	rtld_lazy = 0
+	dl_ext   = '.dll'
 )
 
 fn C.LoadLibrary(libfilename C.LPCWSTR) voidptr