Framework: Rewrite nodejs.mk and reorganize www/{node,npm,yarn}

The current USES=nodejs has the following issues:
- www/node is not the default version while www/node16 is.
- It also means inconsistent naming of node ports.
- www/npm duplicates with www/npm-node16.
- www/yarn duplicates with www/yarn-node16.

The notable changes are introduced to fix the above issues:
- Rewrite Mk/Uses/nodejs.mk.
- Add new LTS version of nodejs (www/noe18).
- Add new current version of nodejs (www/node19).
- Change default nodejs version from 16 to 18 (latest LTS).
- Use consistent naming for all supported node versions.
- Convert www/node, www/npm and www/yarn to meta ports.

After this commit:
- All supported node versions are named as node{14,16,18,19}
- www/node is a meta port which depends on the default version (e.g. www/node18)
- www/npm is a meta port which depends on the default version (e.g. www/npm-node18)
- www/yarn is a meta port which depends on the default version (e.g. www/yarn-node18)
- Bump PORTREVISION of dependent ports for dependency change (from www/node16 to www/node18)

Discussed with:	jrm, otis, pizzamig

1 files changed, 12 insertions, 0 deletions

diff --git a/www/node19/files/patch-node.gypi b/www/node19/files/patch-node.gypi
new file mode 100644
index 000000000000..f48b5b1091cb
--- /dev/null
+++ b/www/node19/files/patch-node.gypi
@@ -0,0 +1,12 @@
+--- node.gypi.orig	2021-10-19 00:48:32 UTC
++++ node.gypi
+@@ -319,6 +319,9 @@
+     [ 'node_use_openssl=="true"', {
+       'defines': [ 'HAVE_OPENSSL=1' ],
+       'conditions': [
++        ['openssl_no_asm==1', {
++          'defines': [ 'OPENSSL_NO_ASM' ],
++        }],
+         [ 'node_shared_openssl=="false"', {
+           'defines': [ 'OPENSSL_API_COMPAT=0x10100000L', ],
+           'dependencies': [