avoid jdk-11.0.6+10: it shows problem "S8217731: Font rendering and glyph spacing changed from jdk-8 to jdk-11" https://bugs.openjdk.java.net/browse/JDK-8217731 even though the changelog claims to have resolved this;

--- a/Admin/components/components.sha1	Sat Mar 21 21:41:13 2020 +0100
+++ b/Admin/components/components.sha1	Sun Mar 22 22:03:48 2020 +0100
@@ -96,6 +96,7 @@
 3e05213cad47dbef52804fe329395db9b4e57f39  jdk-11.0.2+9.tar.gz
 06ac8993b5bebd02c70f1bd18ce13075f01115f3  jdk-11.0.3+7.tar.gz
 e7e3cc9b0550c1e5d71197ad8c30f92b622d7183  jdk-11.0.4+11.tar.gz
+49007a84a2643a204ce4406770dfd574b97880d9  jdk-11.0.5+10.tar.gz
 3c250e98eb82f98afc6744ddc9170d293f0677e1  jdk-11.0.6+10.tar.gz
 71d19df63816e9be1c4c5eb44aea7a44cfadb319  jdk-11.tar.gz
 8d83e433c1419e0c0cc5fd1762903d11b4a5752c  jdk-6u31.tar.gz

--- a/Admin/components/main	Sat Mar 21 21:41:13 2020 +0100
+++ b/Admin/components/main	Sun Mar 22 22:03:48 2020 +0100
@@ -5,7 +5,7 @@
 cvc4-1.5-5
 e-2.0-3
 isabelle_fonts-20190717
-jdk-11.0.6+10
+jdk-11.0.5+10
 jedit_build-20190717
 jfreechart-1.5.0
 jortho-1.0-2