MAINT: refguide-check absolute module names
MAINT: refguide-check absolute module names

Sync numpy/pr/21572:

Make refguide-check accept module names either relative to the BASE_MODULE
or absolute, so that these two are equivalent:

$ python runtests.py --refguide-check -s lib.recfunctions

and

$ python runtests.py --refguide-check -s numpy.lib.recfunctions

Previously, only the former was accepted.

scipy/scipy,endolith/scipy,Stefan-Endres/scipy,anntzer/scipy,Stefan-Endres/scipy,ilayn/scipy,mdhaber/scipy,perimosocordiae/scipy,rgommers/scipy,endolith/scipy,endolith/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,andyfaff/scipy,perimosocordiae/scipy,scipy/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,rgommers/scipy,anntzer/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,anntzer/scipy,WarrenWeckesser/scipy,scipy/scipy,mdhaber/scipy,rgommers/scipy,WarrenWeckesser/scipy,mdhaber/scipy,perimosocordiae/scipy,ilayn/scipy,mdhaber/scipy,Stefan-Endres/scipy,scipy/scipy,andyfaff/scipy,andyfaff/scipy,ilayn/scipy,endolith/scipy,anntzer/scipy,endolith/scipy,ilayn/scipy,ilayn/scipy,Stefan-Endres/scipy,anntzer/scipy,endolith/scipy,perimosocordiae/scipy,mdhaber/scipy,rgommers/scipy,rgommers/scipy,anntzer/scipy,mdhaber/scipy,scipy/scipy,scipy/scipy,perimosocordiae/scipy,ilayn/scipy,andyfaff/scipy,andyfaff/scipy,andyfaff/scipy