security/zenmap: Update to 7.25 BETA2 and use security/nmap as MASTERDIR
security/nmap:
- Ensure MAINTAINER and COMMENT do not clobber those of slave port
- Add .if !defined(MASTERDIR) to prevent inclusion in slave port
- Do not include bsd.port.options.mk, as none of the features are used
security/zenmap:
- Convert to slave of security/nmap to ensure they are updated in lockstep
- Inherently update to 7.25 BETA2 (current version of security/nmap)
- Remove redundant port header variables included from MASTERDIR
- PKGNAME of zenmap achieved using PKGNAMEPREFIX=ze and PORTNAME=nmap
- Add LICENSE details, as they are separately documented in the distfile
- Set directory variables so they are not inhereted from MASTERDIR
- Convert post-extract to post-patch, as it is modifying WRKSRC files
- Fix REINPLACE command, as it was leaving the line with nothing but a single ',' and causing the build to fail
- Do not download external zenmap icon, as one is included in distfile