Extra notes about keyring problems. Version bump to 4.8

HISTORY.txt

@@ -1,3 +1,8 b''
+
+1.2.1
+~~~~~~~~~~~~
+
+Tested against hg 4.8 (no changes needed).
 
 1.2.0
 ~~~~~~~~~~~~
@@ -15,8 +20,6 b' handling (propts).'
 Refreshing smtp monkeypatch to be a bit more like modern mercurials
 (in particular, obligatory cert falidaton).
 
-
-
 1.1.9
 ~~~~~~~~~~~~
 

README.txt

@@ -365,6 +365,15 b' for further pointers in keyring_ documen'
 list, or issue tracker. Typically it will turn out, that you need to
 install some missing tool, or library, and reinstall keyring.
 
+.. note::
+
+   Depending on keyring_ version, installation of some dependency may
+   resolve problem. For example (as of late 2018), I got KDE Wallet
+   backend working with pip-installed keyring after::
+
+       pip install dbus-python
+
+
 If ``keyring`` command works, but mercurial with mercurial_keyring does not,
 try enforcing  proper backend (by means of ``keyringrc.cfg``, see above).
 Only if this doesn't help, there may be a bug in mercurial_keyring.
@@ -379,6 +388,7 b" Only if this doesn't help, there may be "
 
 
 
+
 History
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