do not build rrd_cgi when we have no graph support
handle missing rrd_graph support
support HAVE_RRD_GRAPH
Merge pull request #509 from oetiker/support_missing_graph_in_bindings

Support missing graph in bindings
it is rrdtool info not rrdinfo
Merge branch 'master' of github.com:oetiker/rrdtool-1.x
* msync is NOT necessary before munmap, the data gets synced automatically
* remove WILLNEED madvise, this only slows the code down while the os des not seem todo anything sensible with the info
Merge pull request #511 from oetiker/remove-extra-advise-and-sync

Remove unnecessary WILLNEED and msync calls
integrate rrd_snprintf
include snprintf.m4 in the distro
fix preprocessor warnings
Added locale independent versions of strtod function
Removed setlocale calls, used rrd_strtod & rrd_snprintf
Fixed some terrible indentations
Merge pull request #513 from Sweet-kid/rrd_snprintf

Removed setlocale instances https://github.com/oetiker/rrdtool-1.x/issues/504 #510
make rrd_strtod and rrd_snprintf available for all to enjoy
more tests
fix spelling
added rrd_strtoding & replaced all rrd_strtod instances with it
Added rrd_strtoding to the symbol export list