Inspired by Martijn Koster's patch and example source at

http://www.greenhills.co.uk/mak/gentoo/curl-eintr-bug.c, I now made the
select() and poll() calls properly loop if they return -1 and errno is
EINTR. glibc docs for this is found here:
http://www.gnu.org/software/libc/manual/html_node/Interrupted-Primitives.html

This last link says BSD doesn't have this "effect". Will there be a problem
if we do this unconditionally?
S: ----------------------------------------------------------------------

RELEASE-NOTES

@@ -16,6 +16,7 @@ This release includes the following changes:
 
 This release includes the following bugfixes:
 
+ o re-invoke some system calls on EINTR
  o duplicate Host: when failed connection re-use
  o SOCKS5 version check
  o memory problem with cleaning up multi interface
@@ -36,6 +37,7 @@ advice from friends like these:
 
  Dan Fandrich, Peter Pentchev, Marcin Konicki, Rune Kleveland, David Shaw,
  Werner Koch, Gisle Vanem, Alex Neblett, Kai Sommerfeld, Marty Kuhrt,
- Hzhijun, Pavel Orehov, Bruce Mitchener, Cyrill Osterwalder, Dan Torop
+ Hzhijun, Pavel Orehov, Bruce Mitchener, Cyrill Osterwalder, Dan Torop,
+ Martijn Koster
 
         Thanks! (and sorry if I forgot to mention someone)