strongswan: enable options that are required for MSCHAPv2.

According to the documentation [1], StrongSwan needs --enable-md4 for
eap-mschapv2 to work. Moreover, many EAP-MSCHAPv2 based VPNs require
--enable-eap-identity and --enable-eap-dynamic to correctly work. This
commit simply adds these flags in the StrongSwan `template` file.

https://wiki.strongswan.org/projects/strongswan/wiki/AutoConf

srcpkgs/strongswan/template

@@ -1,12 +1,12 @@
 # Template file for 'strongswan'
 pkgname=strongswan
 version=5.8.4
-revision=1
+revision=2
 build_style=gnu-configure
 # tpm support waits on libtss2
-configure_args="--disable-static --enable-blowfish --enable-curl
- --enable-eap-radius --enable-eap-mschapv2 --enable-eap-md5 --enable-led
- --enable-ha --enable-dhcp --enable-mediation --enable-soup --disable-des
+configure_args="--disable-static --enable-blowfish --enable-curl --enable-md4
+ --enable-eap-radius --enable-eap-mschapv2 --enable-eap-md5 --enable-eap-identity --enable-eap-dynamic
+ --enable-led --enable-ha --enable-dhcp --enable-mediation --enable-soup --disable-des
  --enable-chapoly --enable-nm"
 hostmakedepends="pkg-config flex bison python"
 makedepends="gmp-devel libsoup-devel libldns-devel unbound-devel libcurl-devel NetworkManager-devel"