review retrieveerrorsemantic contribution to avoid mail loss (cf. POP3
LAST)
-clean up APOP, KPOP, SSL options
+clean up KPOP, SSL options
fix versions in features.html (6.4 vs. 7.0)
+update README
+
+check for other 6.2/6.3-specific documentation
+
merge libpwmd updates
fix versions 7.0/6.4/6.3.20 in fetchmail.man, want 7.0 for this release,