smokeping intermittent build fix: add BDEPs on the optional modules used
by probes; build runs smokeping's --makepod option to create manuals for
these, which tries to import modules used by these. if hit at the wrong
time during a bulk build this can fail.
tb@ ran into this while p5-Net-DNS was partway through installation:
pod2man --release=2.9.0 --center=SmokePing Smokeping_probes_AnotherCurl.pod --section 3 > Smokeping_probes_AnotherCurl.3
PERL5LIB=/usr/local/libdata/perl5/site_perl /usr/bin/perl -I../thirdparty/lib/perl5 -I../lib -mSmokeping -e 'Smokeping::main()' -- --makepod Smokeping::probes::AnotherDNS > Smokeping_probes_AnotherDNS.pod
require Smokeping::probes::AnotherDNS failed: Attempt to reload Net/DNS.pm aborted.
Compilation failed in require at ../lib/Smokeping/probes/AnotherDNS.pm line 26.
BEGIN failed--compilation aborted at ../lib/Smokeping/probes/AnotherDNS.pm line 26.
fix old typo/thinko in readme while there (IO::Pty is in the p5-IO-Tty
package).