uwsgi-cgi: General cleanup

* Remove stray LICENSE file added to repo
* Use codeload instead of git
* Add proper (as close as possible) SPDX license
* Drop OpenSSL, PCRE and Libxml2 as dependencies
  Makes it more suitable alternative for small flash devices
* Drop /etc/uwsgi as there's only one config file
* Remove stray /etc/nginx directory
* Reorganize configuration file
* Convert init.d script to use procd
* Hardset 3 threads and processes, seems like a good tradeoff
  between performance and memory usage instead of doing
  auto scaling based on amout of cpu cores/threads

Non-scientific benchmark (tm)
ramips, mt7621, WiTi Board 16/256M

1. 3 threads, 6 processes
2. 2 threads, 2 processes
3. 3 threads, 3 processes

- LuCI Main page

1.48s
1.72s
1.64s

- Status --> Firewall

6.24s
6.39s
6.40s

- Status --> Kernel log

266ms
256ms
251ms

- Network --> Firewall

936ms
1.08s
1.07s

- Network --> Wireless

1.39s
1.42s
1.40s

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

net/uwsgi-cgi/Makefile

@@ -2,15 +2,14 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=uwsgi-cgi
 PKG_VERSION:=2.0.17.1
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
-PKG_SOURCE_PROTO:=git
-PKG_SOURCE_URL:=https://github.com/unbit/uwsgi
-PKG_SOURCE_DATE:=2018-07-08
-PKG_SOURCE_VERSION:=4b3e9621c0a3eb2aacf937b8e84e67b23b20490b
-PKG_MIRROR_HASH:=a843909ad5e8c36b86392d99c8bd411a84c14ad51993ba63638180212c7819e2
+PKG_SOURCE_URL=https://codeload.github.com/unbit/uwsgi/tar.gz/$(PKG_VERSION)?
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_HASH:=d2318235c74665a60021a4fc7770e9c2756f9fc07de7b8c22805efe85b5ab277
+PKG_BUILD_DIR:=$(BUILD_DIR)/uwsgi-$(PKG_VERSION)
 
-PKG_LICENSE:=GPL2 + linking exception
+PKG_LICENSE:=GPL-2.0-or-later
 PKG_LICENSE_FILES:=LICENSE
 PKG_MAINTAINER:=Ansuel Smith <ansuelsmth@gmail.com>
 
@@ -23,7 +22,7 @@ define Package/uwsgi-cgi
   SUBMENU:=Web Servers/Proxies
   TITLE:=The uWSGI server
   URL:=http://unbit.com/
-  DEPENDS:=+libcap +libopenssl +libpcre +jansson +libuuid +libxml2
+  DEPENDS:=+libcap +jansson +libuuid
 endef
 
 define Package/uwsgi-cgi-luci-support
@@ -54,9 +53,7 @@ endef
 define Package/uwsgi-cgi-luci-support/install
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files-luci-support/uwsgi.init $(1)/etc/init.d/uwsgi
-	$(INSTALL_DIR) $(1)/etc/uwsgi
-	$(INSTALL_BIN) ./files-luci-support/uwsgi.conf $(1)/etc/uwsgi/uwsgi.conf
-	$(INSTALL_DIR) $(1)/etc/nginx
+	$(INSTALL_BIN) ./files-luci-support/uwsgi.conf $(1)/etc/uwsgi.conf
 endef
 
 $(eval $(call BuildPackage,uwsgi-cgi))