- updated to 1.59:
+ add -E option to filter escape-sequences, e.g., from colordiff
(Ubuntu #1304262).
+ merge/adapt improvments to makefile and configure script from
openembedded.org (forwarded by Ross Burton).
+ remove unused $(libdir) from makefile "installdirs" target
+ amend definition in CF_POPEN_TEST to permit use of autoheader.
+ workaround for gratuitous renaming of AC_ACVERSION in 2.69
+ added "docs" rule to makefile
+ improvements to configure macros:
+ added check for -Wlogical-op to gcc warnings
+ suppress check for defining _XOPEN_SOURCE on Solaris
+ trim an unwanted -no-gcc option for Intel compiler
+ update config.guess, config.sub