Revert "kde5.frameworks: 5.21 -> 5.22"

This reverts commit 112d4c71b2.

This upgrade causes a serious Plasma performance degradation and causes
incorrect font rendering. Reverting until the cause is known.

pkgs/desktops/kde-5/frameworks-5.21/fetchsrcs.sh

@@ -4,7 +4,7 @@
 set -x
 
 # The trailing slash at the end is necessary!
-RELEASE_URL="http://download.kde.org/stable/frameworks/5.22/"
+RELEASE_URL="http://download.kde.org/stable/frameworks/5.21/"
 EXTRA_WGET_ARGS='-A *.tar.xz'
 
 mkdir tmp; cd tmp

pkgs/desktops/kde-5/frameworks-5.21/kio/default.nix

@@ -22,6 +22,7 @@ kdeFramework {
     wrapQtProgram "$out/bin/kcookiejar5"
     wrapQtProgram "$out/bin/ktelnetservice5"
     wrapQtProgram "$out/bin/ktrash5"
+    wrapQtProgram "$out/bin/kmailservice5"
     wrapQtProgram "$out/bin/protocoltojson"
   '';
 }

pkgs/desktops/kde-5/frameworks-5.21/kservice/ksycoca-buffer-size.patch

@@ -0,0 +1,25 @@
+Index: kservice-5.21.0/src/sycoca/ksycocautils.cpp
+===================================================================
+--- kservice-5.21.0.orig/src/sycoca/ksycocautils.cpp
++++ kservice-5.21.0/src/sycoca/ksycocautils.cpp
+@@ -24,9 +24,10 @@
+ 
+ void KSycocaUtilsPrivate::read(QDataStream &s, QString &str)
+ {
++    const qint32 bufferSize = 65528;
+     quint32 bytes;
+     s >> bytes;                          // read size of string
+-    if (bytes > 8192) {                  // null string or too big
++    if (bytes > bufferSize) {                  // null string or too big
+         if (bytes != 0xffffffff) {
+             KSycoca::flagError();
+         }
+@@ -35,7 +36,7 @@ void KSycocaUtilsPrivate::read(QDataStre
+         int bt = bytes / 2;
+         str.resize(bt);
+         QChar *ch = str.data();
+-        char t[8192];
++        char t[bufferSize];
+         char *b = t;
+         s.readRawData(b, bytes);
+         while (bt--) {

pkgs/desktops/kde-5/frameworks-5.21/kservice/series

@@ -0,0 +1,3 @@
+qdiriterator-follow-symlinks.patch
+no-canonicalize-path.patch
+ksycoca-buffer-size.patch